Jaguar XJ range 1995 Fuel, Emission Control and Engine Management Page Two

Jaguar XJ 1995 
Fuel, Emission Control and Engine Management (V12) 202 – 5.2 

Mass Air Flow Sensor – P0106
Model:
Jaguar XJ 1995
Complaint:
The fault code P0106 is likely to be set due to a (Bank A) MAP sensor range or performance fault.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 5 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 5 of the test below.
Disconnect the sensor and go to step 1 of the test below if no faults are found.
 
Test:
1.      Check the harness insulation PI 009/003 will complete a circuit to ground. If this gives a positive result then go to step 2. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 5.
2.      Ensure the inlet manifold pressure hose is in good condition. If it is in good condition then go to step 3. If it is faulty then repair the damage or replace the hose, re-connect the harness and go to step 5.
3.      Ensure inlet manifold pressure hose filter is in good condition. If it is in good condition then go to step 4. If it is faulty then repair the damage or replace the filter, re-connect the harness and go to step 5.
4.      Ensure the inlet manifold is in good condition. If it is in good condition then go to step 5. If it is faulty then repair the damage or replace the manifold, re-connect the harness and go to step 5.
5.      Clear the fault. Then in order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 6.
6.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
Mass Air Flow Sensor – P1106
Model:
Jaguar XJ 1995
Complaint:
The fault code P1106 is likely to be set due to a (Bank B) MAP sensor range or performance fault.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 5 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 5 of the test below.
Disconnect the sensor and go to step 1 of the test below if no faults are found.
 
Test:
1.      Check the harness insulation PI 050/003 will complete a circuit to ground. If this gives a positive result then go to step 2. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 5.
2.      Ensure the inlet manifold pressure hose is in good condition. If it is in good condition then go to step 3. If it is faulty then repair the damage or replace the hose, re-connect the harness and go to step 5.
3.      Ensure inlet manifold pressure hose filter is in good condition. If it is in good condition then go to step 4. If it is faulty then repair the damage or replace the filter, re-connect the harness and go to step 5.
4.      Ensure the inlet manifold is in good condition. If it is in good condition then go to step 5. If it is faulty then repair the damage or replace the manifold, re-connect the harness and go to step 5.
5.      Clear the fault. Then in order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 6.
6.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
Mass Air Flow Sensor – P0107
Model:
Jaguar XJ 1995
Complaint:
The fault code P0107 is likely to be set due to a (Bank A) MAP sensor low input fault.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 6 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 6 of the test below.
Disconnect the sensor and go to step 1 of the test below if no faults are found.
 
Test:
1.      Ensure the harness continuity PI 009/001 is correctly wired to ECM pin PI 045/016. If this gives a positive result then go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 6.
2.      Ensure the harness continuity PI 009/002 is correctly wired to ECM pin PI 045/002. If this gives a positive result then go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 6.
3.      Ensure the harness continuity PI 009/003 is correctly wired to PI 045/007. If this gives a positive result then go to step 4. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 6.
4.      Check the harness insulation PI 009/001 will complete a circuit to PI 009/002. If this gives a positive result then go to step 5. If it is faulty then find and repair the wiring fault, re-connect the harness and go to step 6.
5.      Check the harness insulation PI 009/001 will complete a circuit to PI 009/003. If this gives a positive result replace the sensor, re-connect the harness and go to step 6. If it is faulty then find and repair the wiring fault, re-connect the harness and go to step 6.
6.      Clear the fault. Then in order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 7.
7.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
Mass Air Flow Sensor – P1107
Model:
Jaguar XJ 1995
Complaint:
The fault code P1107 is likely to be set due to a (Bank B) MAP sensor low input fault.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 6 of the test below.
With the engine turned off. Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 6 of the test below.
Disconnect the sensor and go to step 1 of the test below if no faults are found.
 
Test:
1.      Ensure the harness continuity PI 050/001 is correctly wired to ECM pin PI 045/016. If this gives a positive result then go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 6.
2.      Ensure the harness continuity PI 050/002 is correctly wired to ECM pin PI 045/001. If this gives a positive result then go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 6.
3.      Ensure the harness continuity PI 009/003 is correctly wired to PI 045/007. If this gives a positive result then go to step 4. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 6.
4.      Check the harness insulation PI 050/001 will complete a circuit to PI 050/002. If this gives a positive result then go to step 5. If it is faulty then find and repair the wiring fault, re-connect the harness and go to step 6.
5.      Check the harness insulation PI 050/001 will complete a circuit to PI 050/003. If this gives a positive result replace the sensor, re-connect the harness and go to step 6. If it is faulty then find and repair the wiring fault, re-connect the harness and go to step 6.
6.      Clear the fault. Then in order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 7.
7.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
Mass Air Flow Sensor – P0108
Model:
Jaguar XJ 1995
Complaint:
The fault code P0108 is likely to be set due to a (Bank A) MAP sensor high input fault.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 6 of the test below.
With the engine turned off. Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 6 of the test below.
Disconnect the sensor and go to step 1 of the test below if no faults are found.
 
Test:
1.      Ensure the harness continuity PI 009/001 is correctly wired to PI 045/016. If this gives a positive result then go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 6.
2.      Ensure the harness continuity PI 009/002 is correctly wired to PI 045/002. If this gives a positive result then go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 6.
3.      Ensure the harness continuity PI 009/003 is correctly wired to PI 045/007. If this gives a positive result then go to step 4. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 6.
4.      Ensure PI 009/001, PI 009/002 and PI 009/003 have the correct voltage level to Vbatt. If the reading is 0V then go to step 5. If the level is above 0V then find and repair the wiring fault, re-connect the harness and go to step 6.
5.      Check the harness insulation PI 009/002 will complete a circuit to PI 009/003. If this gives a positive result replace the sensor, and go to step 6. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 6.
6.      Clear the fault. Then in order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 7.
7.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
Mass Air Flow Sensor – P1108
Model:
Jaguar XJ 1995
Complaint:
The fault code P1108 is likely to be set due to a (Bank A) MAP sensor high input fault.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 6 of the test below.
With the engine turned off. Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 6 of the test below.
Disconnect the sensor and go to step 1 of the test below if no faults are found.
 
Test:
1.      Ensure the harness continuity PI 009/001 is correctly wired to PI 045/016. If this gives a positive result then go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 6.
2.      Ensure the harness continuity PI 009/002 is correctly wired to PI 045/002. If this gives a positive result then go to step 3. If the circuit is open then repair or replace the MAP, re-connect the harness and go to step 6.
3.      Ensure the harness continuity PI 009/003 is correctly wired to PI 045/007. If this gives a positive result then go to step 4. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 6.
4.      Ensure PI 009/001, PI 009/002 and PI 009/003 have the correct voltage level to Vbatt. If the reading is 0V then go to step 5. If the level is above 0V then find and repair the wiring fault, re-connect the harness and go to step 6.
5.      Check the harness insulation PI 009/002 will complete a circuit to PI 009/003. If this gives a positive result, replace the sensor, and go to step 6. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 6.
6.      Clear the fault. Then in order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 7.
7.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
Intake air Temperature – P0111
Model:
Jaguar XJ 1995
Complaint:
The fault code P0111 is likely to be set due to an IAT range or performance fault.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 8 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 8 of the test below.
Go to step 1 of the test below if no faults are found.
 
Test:
1.      Whilst monitoring PID OFH ensure the temperature range is within the correct limits. If the range is within limits then go to step 2. If the temperature range is not within the correct limits then repair and go to step 8.
2.      Ensure the air intake system is working sufficiently. If this gives a positive result then disconnect the IAT sensor and go to step 3. If the air intake system is faulty then repair or replace it and go to step 8.
3.      Ensure the harness continuity PI 006/001 is correctly wired to PI 045/006. If this gives a positive result then go to step 4. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 8.
4.      Ensure the harness continuity PI 006/002 is correctly wired to PI 045/016. If this gives a positive result then go to step 5. If the circuit is open then repair or replace the wiring fault, re-connect the harness and go to step 8.
5.      Check the harness insulation PI 006/001 will complete a circuit to PI 006/002. If this gives a positive result then go to step 6. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 8.
6.      Ensure the harness continuity PI 006/002 is correctly wired to ground. If this gives a positive result then go to step 7. If the circuit is open then repair or replace the wiring fault, re-connect the harness and go to step 8.
7.      Ensure the sensor resistance is within the correct limits of 107 – 26990 Ohms. If this gives a positive result then go to step 8. If the sensor resistance is out of limits then replace IAT sensor, re-connect the harness and go to step 8.
8.      Clear the fault. Then in order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 9.
9.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
Intake air sensor – P0112
Model:
Jaguar XJ 1995
Complaint:
The fault code P0112 is likely to be set due to an IAT low input fault.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 6 of the test below.
With the engine turned off. Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 6 of the test below.
Go to step 1 of the test below if no faults are found.
 
Test:
1.      Whilst monitoring PID OFH ensure the temperature range is within the correct limits of -48 to +148 Celsius. If the range is within limits then go to step 2. If the temperature range is not within the correct limits then repair and go to step 6.
2.      Ensure the air intake system is working sufficiently. If this gives a positive result then with the engine turned off, disconnect the IAT sensor and go to step 3. If the air intake system is faulty then repair or replace it and go to step 6.
3.      Ensure the harness continuity PI 006/001 is correctly wired to PI 045/006. If this gives a positive result then go to step 4. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 6.
4.      Ensure the harness continuity PI 006/002 is correctly wired to PI 045/016. If this gives a positive result then go to step 5. If the circuit is open then repair or replace the wiring fault, re-connect the harness and go to step 6.
5.      Ensure the sensor resistance is within the correct limits of 107 – 26990 Ohms. If this gives a positive result then go to step 6. If the sensor resistance is out of limits then replace IAT sensor, re-connect the harness and go to step 6.
6.      Clear the fault. Then in order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 7.
7.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
Intake air sensor – P0113
Model:
Jaguar XJ 1995
Complaint:
The fault code P0113 is likely to be set due to an IAT high input fault.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 6 of the test below.
With the engine turned off. Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 6 of the test below.
Go to step 1 of the test below if no faults are found.
 
Test:
1.      Whilst monitoring PID OFH ensure the temperature range is within the correct limits of -48 to +148 Celsius. If the range is within limits then go to step 2. If the temperature range is not within the correct limits then repair and go to step 6.
2.      Ensure the air intake system is working sufficiently. If this gives a positive result then with the engine turned off, disconnect the IAT sensor and go to step 3. If the air intake system is faulty then repair or replace it and go to step 6.
3.      Ensure the harness continuity PI 006/001 is correctly wired to PI 045/006. If this gives a positive result then go to step 4. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 6.
4.      Ensure the harness continuity PI 006/002 is correctly wired to PI 045/016. If this gives a positive result then go to step 5. If the circuit is open then repair or replace the wiring fault, re-connect the harness and go to step 6.
5.      Ensure the sensor resistance is within the correct limits of 107 – 26990 Ohms. If this gives a positive result then go to step 6. If the sensor resistance is out of limits then replace IAT sensor, re-connect the harness and go to step 6.
6.      Clear the fault. Then in order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 7.
7.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
 
Engine Coolant Temperature Sensor – P0116
Model:
Jaguar XJ 1995
Complaint:
The fault code P0116 is likely to be set due to an ECT range or performance fault with falling temperature.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 7 of the test below.
With the engine turned off. Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 7 of the test below.
Go to step 1 of the test below if no faults are found.
 
Test:
1.      Ensure the engine coolant level is correct. If it is then go to step 2. If it is too low then top it up and go to step 7.
2.      Ensure the coolant temperature gauge on the instrument pack is working correctly. If it is then remove the thermostat and go to step 3. If it is faulty then repair or replace the gauge and go to step 7.
3.      Ensure the thermostat operation is working sufficiently. If it gives a positive result then disconnect the ECT sensor and go to step 4. If it is not working sufficiently then replace the thermostat, re-connect the harness and go to step 7.
4.      Ensure the harness continuity PI 005/001 is correctly wired to PI 045/016. If this gives a positive result then go to step 5. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 7.
5.      Ensure the harness continuity PI 005/002 is correctly wired to PI 045/005. If this gives a positive result then go to step 6. If the circuit is open then repair or replace the wiring fault, re-connect the harness and go to step 7.
6.      Ensure the sensor resistance is within the correct limits of 107 – 26990 Ohms. If this gives a positive result then go to step 7. If the sensor resistance is out of limits then replace sensor, re-connect the harness and go to step 7.
7.      Clear the fault. Then in order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 9.
8.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
Engine Coolant Temperature Sensor – P0117
Model:
Jaguar XJ 1995
Complaint:
The fault code P0117 is likely to be set due to an ECT low input fault.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 5 of the test below.
With the engine turned off. Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 5 of the test below.
Go to step 1 of the test below if no faults are found.
 
Test:
1.      Whilst monitoring PID OFH ensure the temperature range is within the correct limits of -48 to +148 Celsius. If the range is within limits then switch off engine, disconnect the ECT and go to step 2. If the temperature range is not within the correct limits then repair and go to step 5.
2.      Ensure the harness continuity PI 005/001 is correctly wired to PI 045/016. If this gives a positive result then go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 5.
3.      Ensure the harness continuity PI 005/002 is correctly wired to PI 045/005. If this gives a positive result then go to step 4. If the circuit is open then repair or replace the wiring fault, re-connect the harness and go to step 5.
4.      Ensure the sensor resistance is within the correct limits of 107 – 26990 Ohms. If this gives a positive result then go to step 5. If the sensor resistance is out of limits then replace the sensor, re-connect the harness and go to step 5.
5.      Clear the fault. Then in order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 7.
6.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
Engine Coolant Temperature Sensor – P0118
Model:
Jaguar XJ 1995
Complaint:
The fault code P0118 is likely to be set due to an ECT high input fault.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 6 of the test below.
With the engine turned off. Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 6 of the test below.
Go to step 1 of the test below if no faults are found.
 
Test:
1.      Whilst monitoring PID OFH ensure the temperature range is within the correct limits of -48 to +148 Celsius. If the range is within limits then go to step 2. If the temperature range is not within the correct limits then repair and go to step 6.
2.      Ensure the harness continuity PI 005/001 is correctly wired to PI 045/016. If this gives a positive result then go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 6.
3.      Ensure the harness continuity PI 005/002 is correctly wired to PI 045/005. If this gives a positive result then go to step 4. If the circuit is open then repair or replace the wiring fault, re-connect the harness and go to step 6.
4.      Check the harness insulation PI 005/001 and PI 005/002 will complete a circuit to Vbatt. If this gives a positive result, replace the sensor, and go to step 5. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 6.
5.      Ensure the sensor resistance is within the correct limits of 107 – 26990 Ohms. If this gives a positive result then go to step 6. If the sensor resistance is out of limits then replace the sensor, re-connect the harness and go to step 6.
6.      Clear the fault. Then in order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 7.
7.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
Engine Coolant Temperature Sensor – P0125
Model:
Jaguar XJ 1995
Complaint:
The fault code P0125 is likely to be set due to a fuel control fault where there is an excess of time when entering closed loop. It will also show in conjunction with fault code P0116.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 8 of the test below.
With the engine turned off. Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 8 of the test below.
Go to step 1 of the test below if no faults are found.
 
Test:
1.      Ensure the engine coolant level is correct. If it is then go to step 2. If it is too low then top it up and go to step 8.
2.      Ensure the coolant temperature gauge on the instrument pack is working correctly. If it is then remove the thermostat and go to step 3. If it is faulty then repair or replace the gauge and go to step 8.
3.      Ensure the thermostat operation is working sufficiently. If it gives a positive result then disconnect the ECT sensor and go to step 4. If it is not working sufficiently then replace the thermostat, re-connect the harness and go to step 8.
4.      Ensure the harness continuity PI 005/001 is correctly wired to PI 045/016. If this gives a positive result then go to step 5. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 8.
5.      Ensure the harness continuity PI 005/002 is correctly wired to PI 045/005. If this gives a positive result then go to step 6. If the circuit is open then repair or replace the wiring fault, re-connect the harness and go to step 8.
6.      Check the harness insulation PI 005/001 will complete a circuit to PI 005/002. If this gives a positive result, go to step 7. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 8.
7.      Ensure the sensor resistance is within the correct limits of 107 – 26990 Ohms. If this gives a positive result then go to step 8. If the sensor resistance is out of limits then replace the sensor, re-connect the harness and go to step 8.
8.      Clear the fault. Then in order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 9.
9.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
Throttle Position – P0121
Model:
Jaguar XJ 1995
Complaint:
The fault code P0121 is likely to be set due to a fault in the TP range or performance.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 8 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 8 of the test below.
Disconnect the TP sensor and switch on the engine. Then go to step 1 of the test below if no faults are found.
 
Test:
1.      Ensure pin PI 007/004 measures 5V +ve and pin PI 007/001 measures 0V. If so then switch off engine and go to step 2. If the measures are inaccurate then find and repair the wiring fault, re-connect the harness and go to step 8.
2.      Ensure the harness continuity PI 007/002 is correctly wired to PI 045/003. If this gives a positive result then go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 8.
3.      Ensure the harness continuity PI 007/003 is correctly wired to PI 045/004. If this gives a positive result then go to step 4. If the circuit is open then repair or replace the wiring fault, re-connect the harness and go to step 8.
4.      Check the harness insulation PI 007/003 will complete a circuit to PI 007/001. If this gives a positive result, go to step 5. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 8.
5.      Check the harness insulation PI 007/003 will complete a circuit to PI 007/004. If this gives a positive result, go to step 6. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 8.
6.      Attach a multi metre in between the TP terminals 1 and 3. Then in order to check for a smooth response in metre resistance reading, slowly move the wiper through its range. If this gives a positive result then go to step 7. If the reading is inaccurate then repair or replace TP sensor, re-connect the harness and go to step 8.
7.      Ensure there are no blockages in the exhaust or inlet. If there are no blockages then go to step 8. If there are blockages then clear the blockage and go to step 8.
8.      Clear the fault. Then in order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 9.
9.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
Throttle Position – P0122
Model:
Jaguar XJ 1995
Complaint:
The fault code P0122 is likely to be set due to a low input fault in the TP.
Remedy:
Ensure the values of the PID 11H are correct when the throttle is fully open or closed. If they are correct then go to step 9. If they are faulty then replace and go to step 9.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 9 of the test below.
Disconnect the TP sensor and switch on the engine. Then go to step 1 of the test below if no faults are found.
 
Test:
1.      Ensure pin PI 007/004 measures 5V +ve and pin PI 007/001 measures 0V. If so then switch off engine and go to step 2. If the measures are inaccurate then find and repair the wiring fault, re-connect the harness and go to step 9.
2.      Ensure the harness continuity PI 007/002 is correctly wired to PI 045/003. If this gives a positive result then go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 9.
3.      Ensure the harness continuity PI 007/003 is correctly wired to PI 045/004. If this gives a positive result then go to step 4. If the circuit is open then repair or replace the wiring fault, re-connect the harness and go to step 9.
4.      Check the harness insulation PI 007/001 will complete a circuit to PI 007/003. If this gives a positive result, go to step 5. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
5.      Check the harness insulation PI 007/003 will complete a circuit to PI 007/004. If this gives a positive result, go to step 6. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
6.      Ensure the resistance values of the TP sensor pins 1-3 and 3-4 are accurate. If this gives a positive result then go to step 7. If the reading is inaccurate then repair or replace TP sensor, re-connect the harness and go to step 9.
7.      Check the harness insulation PI 007/003 will complete a circuit to Vbatt. If this gives a positive result, go to step 8. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
8.      Ensure there are no blockages in the exhaust or inlet. If there are no blockages then fit a new TP sensor, re-connect the harness and go to step 9. If there are blockages then clear the blockage and go to step 9.
9.      Clear the fault. Then in order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 10.
10.  Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
Throttle Position – P0123
Model:
Jaguar XJ 1995
Complaint:
The fault code P0123 is likely to be set due to a high input fault in the TP.
Remedy:
Ensure the values of the PID 11H are correct when the throttle is fully open or closed. If they are correct then go to step 9. If they are faulty then replace and go to step 9.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 9 of the test below.
Disconnect the TP sensor and switch on the engine. Then go to step 1 of the test below if no faults are found.
 
Test:
1.      Ensure pin PI 007/004 measures 5V +ve and pin PI 007/001 measures 0V. If so then switch off engine and go to step 2. If the measures are inaccurate then find and repair the wiring fault, re-connect the harness and go to step 9.
2.      Ensure the harness continuity PI 007/002 is correctly wired to PI 045/003. If this gives a positive result then go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 9.
3.      Ensure the harness continuity PI 007/003 is correctly wired to PI 045/004. If this gives a positive result then go to step 4. If the circuit is open then repair or replace the wiring fault, re-connect the harness and go to step 9.
4.      Check the harness insulation PI 007/001 will complete a circuit to PI 007/003. If this gives a positive result, go to step 5. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
5.      Check the harness insulation PI 007/003 will complete a circuit to PI 007/004. If this gives a positive result, go to step 6. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
6.      Ensure the resistance values of the TP sensor pins 1-3 and 3-4 are accurate. If this gives a positive result then go to step 7. If the reading is inaccurate then repair or replace TP sensor, re-connect the harness and go to step 9.
7.      Check the harness insulation PI 007/003 will complete a circuit to Vbatt. If this gives a positive result, go to step 8. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
8.      Ensure there are no blockages in the exhaust or inlet. If there are no blockages then fit a new TP sensor, re-connect the harness and go to step 9. If there are blockages then clear the blockage and go to step 9.
9.      Clear the fault. Then in order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 10.
10.  Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
Heated Oxygen Sensors – P0131
Model:
Jaguar XJ 1995
Complaint:
The fault code P0131 is likely to be set due to a H02S low voltage fault in the Bank A upstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 5 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 5 of the test below.
Disconnect the bank A upstream sensor and switch on the engine. Then go to step 1 of the test below if no faults are found.
 
Test:
1.        Check harness continuity PI 025/003 is correctly wired to PI 045/011. If this gives a positive result then go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 5.
2.        Check harness continuity PI 025/004 is correctly wired to PI 045/015. If this gives a positive result then go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 5.
3.        Check harness insulation PI 025/003 will complete a circuit to ground. If this gives a positive result then go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 5.
4.        Check harness continuity PI 025/004 is correctly wired to ground. If this gives a positive result then replace the sensor, re-connect the harness and go to step 5. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 5.
5.        In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 7.
6.        Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0132
Model:
Jaguar XJ 1995
Complaint:
The fault code P0132 is likely to be set due to a H02S high voltage fault in the Bank A upstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 4 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 4 of the test below.
Disconnect the bank A upstream sensor and switch on the engine. Then go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity PI 025/004 is correctly wired to PI 045/015. If this gives a positive result, switch on the engine and go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 4.
2.      Ensure the voltage level at PI 045/015 reads 0V. If so then go to step 3. If it reads above 0V then find and repair the wiring fault, re-connect the harness and go to step 4.
3.      Check harness insulation PI 025/003 will complete a circuit to Vbatt. If this gives a positive result replace the sensor, re-connect the harness and go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 4.
4.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 7.
5.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0133
Model:
Jaguar XJ 1995
Complaint:
The fault code P0133 is likely to be set due to a H02S slow response fault in the Bank A upstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 7 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 7 of the test below.
Disconnect the bank A upstream sensor and switch on the engine. Then go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity PI 025/003 is correctly wired to PI 045/011. If this gives a positive result then go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 7.
2.      Check harness continuity PI 025/004 is correctly wired to PI 045/015. If this gives a positive result then go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 7.
3.      Check harness insulation PI 025/003 will complete a circuit to Vbatt. If this gives a positive result then go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
4.      Check harness insulation PI 025/004 will complete a circuit to Vbatt. If this gives a positive result then go to step 5. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
5.      Check harness insulation PI 025/003 will complete a circuit to ground. If this gives a positive result, switch on the engine and go to step 6. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
6.      Ensure the voltage level at PI 025/004 reads 0V. If so, replace the sensor, re-connect the harness and go to step 7. If the voltage level reads above 0V, find and replace the wiring fault, re-connect the harness and go to step 7.
7.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 8.
8.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0134
Model:
Jaguar XJ 1995
Complaint:
The fault code P0134 is likely to be set due to no activity detected in the H02S Bank A upstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 7 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 7 of the test below.
Disconnect the bank A upstream sensor and switch on the engine. Then go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity PI 025/003 is correctly wired to PI 045/011. If this gives a positive result then go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 7.
2.      Check harness continuity PI 025/004 is correctly wired to PI 045/015. If this gives a positive result then go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 7.
3.      Check harness insulation PI 025/003 will complete a circuit to Vbatt. If this gives a positive result then go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
4.      Check harness insulation PI 025/004 will complete a circuit to Vbatt. If this gives a positive result then go to step 5. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
5.      Check harness insulation PI 025/003 will complete a circuit to ground. If this gives a positive result, switch on the engine and go to step 6. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
6.      Ensure the voltage level at PI 025/004 reads 0V. If so, replace the sensor, re-connect the harness and go to step 7. If the voltage level reads above 0V, find and replace the wiring fault, re-connect the harness and go to step 7.
7.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 8.
8.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0135
Model:
Jaguar XJ 1995
Complaint:
The fault code P0135 is likely to be set due to a H02S heater fault in the Bank A upstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 9 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 9 of the test below.
Disconnect the bank A upstream sensor and switch on the engine. Then go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity PI 025/001 is correctly wired to PI 045/006. If this gives a positive result then go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 9.
2.      Check harness continuity PI 025/002 is correctly wired to RS 006/008. If this gives a positive result then go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 9.
3.      Check harness insulation PI 025/001 will complete a circuit to PI 025/002. If this gives a positive result then go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
4.      Check harness insulation PI 025/001 will complete a circuit to ground. If this gives a positive result then go to step 5. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
5.      Check harness insulation PI 025/002 will complete a circuit to ground. If this gives a positive result, switch on the engine and go to step 6. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
6.      Check harness insulation PI 025/001 will complete a circuit to Vbatt. If this gives a positive result then go to step 7. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
7.      Check harness insulation PI 025/002 will complete a circuit to Vbatt. If this gives a positive result then go to step 8. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
8.      Ensure the heater has a resistance value of 12.27 – 27.27 Ohms. If this gives a positive result, replace the sensor, re-connect the harness and so to step 9. If the reading is out of range, replace the sensor, re-connect ault, re-connect the harness and go to step 9.
9.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 8.
10.  Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0137
Model:
Jaguar XJ 1995
Complaint:
The fault code P0137 is likely to be set due to a H02S low voltage fault in the Bank A upstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 5 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 5 of the test below.
Disconnect the bank A downstream sensor and switch on the engine. Then go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity CA 098/004 is correctly wired to PI 045/009. If this gives a positive result, go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 5.
2.      Check harness continuity CA 098/003 is correctly wired PI 045/015. If this gives a positive result, go to step 3. If the circuit is open find and repair the wiring fault, re-connect the harness and go to step 5.
3.      Check harness insulation CA 098/004 will complete a circuit to ground. If this gives a positive result go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 5.
4.      Check harness continuity CA 098/003 will complete a circuit to ground. If this gives a positive result, replace the sensor, re-connect the harness and go to step 5. If the circuit is open, find and repair the wiring fault, re-connect the harness and go to step 5.
5.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 6.
6.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0138
Model:
Jaguar XJ 1995
Complaint:
The fault code P0138 is likely to be set due to a H02S high voltage fault in the Bank A upstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 4 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 4 of the test below.
Disconnect the bank A downstream sensor and switch on the engine. Then go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity CA 098/003 is correctly wired to PI 045/015. If this gives a positive result, switch on the engine and go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 4.
2.      Ensure the voltage level at PI 045/015 reads 0V. If so, replace the sensor, re-connect the harness and go to step 3. If the voltage level reads above 0V, find and replace the wiring fault, re-connect the harness and go to step 4.
3.      Check harness insulation CA 098/004 will complete a circuit to Vbatt. If this gives a positive result replace the sensor, re-connect the harness and go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 4.
4.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 5.
5.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0139
Model:
Jaguar XJ 1995
Complaint:
The fault code P0139 is likely to be set due to a H02S slow response fault in the Bank A downstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 7 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 7 of the test below.
Disconnect the bank A downstream sensor and go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity CA 098/004 is correctly wired to PI 045/009. If this gives a positive result, go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 7.
2.      Check harness continuity CA 098/003 is correctly wired to PI 045/015. If this gives a positive result, switch on the engine and go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 7.
3.      Check harness insulation CA 098/003 will complete a circuit to Vbatt. If this gives a positive then go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
4.      Check harness insulation CA 098/004 will complete a circuit to Vbatt. If this gives a positive result then go to step 5. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
5.      Check harness insulation CA 098/004 will complete a circuit to ground. If this gives a positive result, turn on the engine and go to step 6. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
6.      Ensure the voltage level at CA 098/003 reads 0V. If so, replace the sensor, re-connect the harness and go to step 7. If the voltage level reads above 0V, find and replace the wiring fault, re-connect the harness and go to step 7.
7.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 8.
8.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0140
Model:
Jaguar XJ 1995
Complaint:
The fault code P0140 is likely to be set due to no response detected in the H02S Bank A downstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 7 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 7 of the test below.
Disconnect the bank A downstream sensor and go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity CA 098/004 is correctly wired to PI 045/009. If this gives a positive result go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 7.
2.      Check harness continuity CA 098/003 is correctly wired to PI 045/015. If this gives a positive result, go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 7.
3.      Check harness insulation CA 098/003 will complete a circuit to Vbatt. If this gives a positive then go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
4.      Check harness insulation CA 098/004 will complete a circuit to Vbatt. If this gives a positive result then go to step 5. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
5.      Check harness insulation CA 098/004 will complete a circuit to ground. If this gives a positive result, turn on the engine and go to step 6. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
6.      Ensure the voltage level at CA 098/003 reads 0V. If so, replace the sensor, re-connect the harness and go to step 7. If the voltage level reads above 0V, find and replace the wiring fault, re-connect the harness and go to step 7.
7.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 8.
8.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0141
Model:
Jaguar XJ 1995
Complaint:
The fault code P0141 is likely to be set due to a H02S heater fault in the Bank A downstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 9 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 9 of the test below.
Disconnect the bank A downstream sensor, turn off the engine and go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity CA 098/001 is correctly wired to PI 045/004. If this gives a positive result, go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 9.
2.      Check harness continuity CA 098/002 is correctly wired to RS 006/008. If this gives a positive result, go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 9.
3.      Check harness insulation CA 098/001 will complete a circuit to CA 098/002. If this gives a positive then go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
4.      Check harness insulation CA 098/001 will complete a circuit to ground. If this gives a positive result then go to step 5. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
5.      Check harness insulation CA 098/002 will complete a circuit to ground. If this gives a positive result, turn on the engine and go to step 6. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
6.      Check harness insulation CA 098/001 will complete a circuit to Vbatt. If this gives a positive result then go to step 7. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
7.      Check harness insulation CA 098/002 will complete a circuit to Vbatt. If this gives a positive result, go to step 8. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
8.      Ensure the heater has a resistance value of 12.27 – 27.27 Ohms. If this gives a positive result, replace the sensor, re-connect the harness and go to step 9. If the reading is out of range, replace the sensor, re-connect ault, re-connect the harness and go to step 9.
9.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 10.
10.  Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0151
Model:
Jaguar XJ 1995
Complaint:
The fault code P0151 is likely to be set due to a H02S low voltage fault in the Bank B upstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 5 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 5 of the test below.
Disconnect the bank B upstream sensor and go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity PI 027/003 is correctly wired to PI 045/010. If this gives a positive result, go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 5.
2.      Check harness continuity PI 027/004 is correctly wired to PI 045/015. If this gives a positive result, go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 5.
3.      Check harness insulation PI 027/003 will complete a circuit to ground. If this gives a positive then go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 5.
4.      Check harness continuity PI 027/004 is correctly wired to ground. If this gives a positive result, replace sensor, re-connect the harness and go to step 5. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 5.
5.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 6.
6.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0152
Model:
Jaguar XJ 1995
Complaint:
The fault code P0152 is likely to be set due to a H02S high voltage fault in the Bank B upstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 4 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 4 of the test below.
Disconnect the bank B upstream sensor and go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity PI 027/004 is correctly wired to PI 045/015. If this gives a positive result, switch on engine and go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 4.
2.      Ensure the voltage level is reading 0V. If so go to step 3. If the reading is above 0V find and repair the wiring fault, re-connect the harness and go to step 4.
3.      Check harness insulation PI 027/003 will complete a circuit to Vbatt. If this gives a positive result, replace the sensor, re-connect the harness and go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 4.
4.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 5.
5.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0153
Model:
Jaguar XJ 1995
Complaint:
The fault code P0153 is likely to be set due to a slow response detected in the H02S Bank B upstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 7 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 7 of the test below.
Disconnect the bank B downstream sensor and go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity PI 027/003 is correctly wired to PI 045/010. If this gives a positive result go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 7.
2.      Check harness continuity PI 027/004 is correctly wired to PI 045/015. If this gives a positive result, go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 7.
3.      Check harness insulation PI 027/003 will complete a circuit to Vbatt. If this gives a positive then go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
4.      Check harness insulation PI 027/004 will complete a circuit to Vbatt. If this gives a positive result then go to step 5. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
5.      Check harness insulation PI 027/003 will complete a circuit to ground. If this gives a positive result, turn on the engine and go to step 6. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
6.      Ensure the voltage level at PI 027/004 reads 0V. If so, replace the sensor, re-connect the harness and go to step 7. If the voltage level reads above 0V, find and replace the wiring fault, re-connect the harness and go to step 7.
7.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 8.
8.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0154
Model:
Jaguar XJ 1995
Complaint:
The fault code P0154 is likely to be set due to no response detected in the H02S Bank B upstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 7 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 7 of the test below.
Disconnect the bank B downstream sensor and go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity PI 027/003 is correctly wired to PI 045/010. If this gives a positive result go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 7.
2.      Check harness continuity PI 027/004 is correctly wired to PI 045/015. If this gives a positive result, go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 7.
3.      Check harness insulation PI 027/003 will complete a circuit to Vbatt. If this gives a positive then go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
4.      Check harness insulation PI 027/004 will complete a circuit to Vbatt. If this gives a positive result then go to step 5. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
5.      Check harness insulation PI 027/003 will complete a circuit to ground. If this gives a positive result, turn on the engine and go to step 6. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
6.      Ensure the voltage level at PI 027/004 reads 0V. If so, replace the sensor, re-connect the harness and go to step 7. If the voltage level reads above 0V, find and replace the wiring fault, re-connect the harness and go to step 7.
7.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 8.
8.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0155
Model:
Jaguar XJ 1995
Complaint:
The fault code P0155 is likely to be set due to a H02S heater fault in the Bank B upstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 9 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 9 of the test below.
Disconnect the bank B downstream sensor, turn off the engine and go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity PI 027/001 is correctly wired to PI 045/005. If this gives a positive result, go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 9.
2.      Check harness continuity PI 027/002 is correctly wired to RS 006/008. If this gives a positive result, go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 9.
3.      Check harness insulation PI 027/001 will complete a circuit to PI 027/002. If this gives a positive then go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
4.      Check harness insulation PI 027/001 will complete a circuit to ground. If this gives a positive result then go to step 5. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
5.      Check harness insulation PI 027/002 will complete a circuit to ground. If this gives a positive result, turn on the engine and go to step 6. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
6.      Check harness insulation PI 027/001 will complete a circuit to Vbatt. If this gives a positive result then go to step 7. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
7.      Check harness insulation PI 027/002 will complete a circuit to Vbatt. If this gives a positive result, go to step 8. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
8.      Ensure the heater has a resistance value of 12.27 – 27.27 Ohms. If this gives a positive result, replace the sensor, re-connect the harness and go to step 9. If the reading is out of range, replace the sensor, re-connect ault, re-connect the harness and go to step 9.
9.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 10.
10.  Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0157
Model:
Jaguar XJ 1995
Complaint:
The fault code P0157 is likely to be set due to a H02S low voltage fault in the Bank B upstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 5 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 5 of the test below.
Disconnect the bank B upstream sensor and go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity CA 099/004 is correctly wired to PI 045/008. If this gives a positive result, go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 5.
2.      Check harness continuity CA 099/003 is correctly wired to PI 045/015. If this gives a positive result, go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 5.
3.      Check harness insulation CA 099/004 will complete a circuit to ground. If this gives a positive then go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 5.
4.      Check harness continuity CA 099/003 is correctly wired to ground. If this gives a positive result, replace sensor, re-connect the harness and go to step 5. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 5.
5.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 6.
6.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0158
Model:
Jaguar XJ 1995
Complaint:
The fault code P0158 is likely to be set due to a H02S high voltage fault in the Bank B downstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 4 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 4 of the test below.
Disconnect the bank B downstream sensor and go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity CA 099/003 is correctly wired to PI 045/015. If this gives a positive result, turn on engine and go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 4.
2.      Ensure the voltage level at PI 045/015 reads 0V. If so, go to step 3. If the voltage level reads above 0V, find and replace the wiring fault, re-connect the harness and go to step 4.
3.      Check harness insulation CA 099/004 will complete a circuit to Vbatt. If this gives a positive result, replace the sensor, re-connect the harness and go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 4.
4.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 6.
5.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0159
Model:
Jaguar XJ 1995
Complaint:
The fault code P0159 is likely to be set due to a slow response fault detected in the H02S Bank B downstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 7 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 7 of the test below.
Disconnect the bank B downstream sensor and go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity CA 099/004 is correctly wired to PI 045/008. If this gives a positive result go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 7.
2.      Check harness continuity CA 099/003 is correctly wired to PI 045/015. If this gives a positive result, go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 7.
3.      Check harness insulation CA 099/003 will complete a circuit to Vbatt. If this gives a positive result then go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
4.      Check harness insulation CA 099/004 will complete a circuit to Vbatt. If this gives a positive result then go to step 5. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
5.      Check harness insulation CA 099/004 will complete a circuit to ground. If this gives a positive result, turn on the engine and go to step 6. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
6.      Ensure the voltage level at CA 099/003 reads 0V. If so, replace the sensor, re-connect the harness and go to step 7. If the voltage level reads above 0V, find and replace the wiring fault, re-connect the harness and go to step 7.
7.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 8.
8.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0160
Model:
Jaguar XJ 1995
Complaint:
The fault code P0160 is likely to be set due no response detected in the H02S Bank B downstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 7 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 7 of the test below.
Disconnect the bank B downstream sensor and go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity CA 099/004 is correctly wired to PI 045/010. If this gives a positive result go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 7.
2.      Check harness continuity CA 099/003 is correctly wired to PI 045/015. If this gives a positive result, go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 7.
3.      Check harness insulation CA 099/003 will complete a circuit to Vbatt. If this gives a positive result then go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
4.      Check harness insulation CA 099/004 will complete a circuit to Vbatt. If this gives a positive result then go to step 5. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
5.      Check harness insulation CA 099/004 will complete a circuit to ground. If this gives a positive result, turn on the engine and go to step 6. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 7.
6.      Ensure the voltage level at CA 099/003 reads 0V. If so, replace the sensor, re-connect the harness and go to step 7. If the voltage level reads above 0V, find and replace the wiring fault, re-connect the harness and go to step 7.
7.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 8.
8.      Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Heated Oxygen Sensors – P0161
Model:
Jaguar XJ 1995
Complaint:
The fault code P0161 is likely to be set due to a H02S heater fault in the Bank B downstream sensor.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 9 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 9 of the test below.
Disconnect the bank B downstream sensor, turn off the engine and go to step 1 of the test below if no faults are found.
 
Test:
1.      Check harness continuity CA 099/001 is correctly wired to PI 045/003. If this gives a positive result, go to step 2. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 9.
2.      Check harness continuity CA 099/002 is correctly wired to RS 006/008. If this gives a positive result, go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 9.
3.      Check harness insulation CA 099/001 will complete a circuit to CA 099/002. If this gives a positive then go to step 4. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
4.      Check harness insulation CA 099/001 will complete a circuit to ground. If this gives a positive result then go to step 5. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
5.      Check harness insulation CA 099/002 will complete a circuit to ground. If this gives a positive result, turn on the engine and go to step 6. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
6.      Check harness insulation CA 099/001 will complete a circuit to Vbatt. If this gives a positive result then go to step 7. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
7.      Check harness insulation CA 099/002 will complete a circuit to Vbatt. If this gives a positive result, go to step 8. If the circuit shorts then find and repair the wiring fault, re-connect the harness and go to step 9.
8.      Ensure the heater has a resistance value of 12.27 – 27.27 Ohms. If this gives a positive result, replace the sensor, re-connect the harness and go to step 9. If the reading is out of range, replace the sensor, re-connect ault, re-connect the harness and go to step 9.
9.      In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 10.
10.  Repeat the diagnostic procedure. If this now omits a positive result then stop.
 
When testing do not test the resistance between sensor pins 3 and 4 as the generated current can damage the platinum electrodes.
 
Adaptive fuel – P0171
Model:
Jaguar XJ 1995
Complaint:
The fault code P0171 is likely to be set due to the system being too lean in Bank A. The fault code P0171 refers to injectors no’s 1 – 6.
Remedy:
Ensure the code P1111 has been logged after the service drive cycle has been completed. If this is not the case then go to step 10 of the test below.
Check the harness and connectors to ensure they are in good condition and are reliable. If they are faulty then either repair or replace and go to step 10 of the test below.
Disconnect the injector harness and go to step 1 of the test below if no faults are found.
 
Test:
1.      Ensure there is a sufficient amount of fuel in the tank. If this gives a positive result then go to step 2. If the tank is empty then refill and go to step 10.
2.      Check harness continuity PI 032/001 is correctly wired to PI 047/010. PI 033/001 is correctly wired to PI 047/006. PI 034/001 is correctly wired to PI 047/008. PI 035/001 is correctly wired to PI 047/006. PI 036/001 is correctly wired to PI 047/010. PI 037/001 is correctly wired to PI 047/008. If this gives a positive result then go to step 3. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 10.
3.      Check harness continuity PI 032/002, PI 033/002, PI 034/002, PI 035/002, PI 036/002, and PI 037/002 is correctly wired to PI 020/005. If this gives a positive result then go to step 4. If the circuit is open then find and repair the wiring fault, re-connect the harness and go to step 10.
4.      Ensure there are no blockages or leaks in the fuel system. If there are no blockages or leaks then go to step 5. If there are blockages or leak then either repair or replace faulty pipe work, re-connect the harness and go to step 10.
5.      When looking at the injector rail ensure the fuel pressure is approximately 2.3 bar or 3.3 absolute. If this gives a positive result then go to step 6. If the pressure is incorrect then repair the fault, re-connect the harness and go to step 10.
6.      Ensure the injectors are functioning correctly. If this gives a positive result then go to step 7. If they are faulty then either replace the injector or repair the fault, re-connect the harness and go to step 10.
7.      Ensure the resistance of the faulty injector is between 13 – 17 Ohms. If this gives a positive result then go to step 8. If the reading is incorrect, replace the injector, re-connect the harness and go to step 10.
8.      Ensure the fault codes ECT, MAPS, TP, EVAP, or IAT have not already been logged. If not then go to step 9. If they have been then clear the faults, re-connect the harness and go to step 10.
9.      Ensure there are no intake air leaks. If not then re-connect the harness and go to step 10. If there are leaks repair the leak, re-connect the harness and go to step 10.
10.  In order to check if the fault code has been cleared perform the service drive cycle. If this gives a positive result then stop. If the fault is still present then go to step 11.
11.  Repeat the diagnostic procedure. If this now omits a positive result then stop.