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2002 Golf 1.6 BCB Engine Code, Rough Idle since cleaning throttle body

Posted By TLDmobilerepair 11/11/2010 9:06:27 AM
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2002 Golf 1.6 BCB Engine Code, Rough Idle since cleaning throttle body...

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TLDmobilerepair
 Posted 11/11/2010 9:06:27 AM
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Customer took car to garage who cleaned throttle body while on the vehicle with the engine running. Before there were no fault lights on the dash. Now the car has a rough idle and has the EPC, Management light & traction control light on.

Fault code stored on engine ecu is 17961 (p1553) - Barometric pressure signal manifold pressure: implausible relation

and

01314 - Engine Control Module (This is stored on the abs module) I've tried basic setting 060 to reset throttle body adaptions, fault codes clear and car runs OK. Once idling for about a minute or the fault reoccurs.

Possibility that cleaning the throttle body has damaged it?

11/11/2010 9:09:13 AM by TLDmobilerepair
TLDmobilerepair
 Posted 11/11/2010 11:18:32 AM
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Managed to get hold of another throttle body off a mate who had one laying around. Fitted it and reset adapations etc. Car ran fine for about 2 miles then the lights popped back on with the above fault codes.
Angus
 Posted 11/11/2010 11:40:27 AM
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TLD

It's distinctly possible that you can't adapt the idle with an active fault-code.

A MAP to BARO implausibility can only exist at key-on.  What are the MAP and BARO [altitude] sensors reading at that time?  [Around 100KPa on both is correct.]

Is the thrust [MAP/IAT] sensor clogged with black gunk?

.

TLDmobilerepair
 Posted 11/11/2010 12:11:23 PM
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Angus,

I've managed to clear the fault codes with just the key on, I've adapted the throttle body on basic setting 060 and this shows up ADP OK, the car now idles fine but after driving it for say 3-4 miles. On pop's the EPC & management light with the 17961 fault code.

I suppose it could be a possibility that the map sensor (which I think is located on the left hand side of the intake manifold by the dip stick?) is clogged with the build up that was relased from the throttle body after cleaning?

Thanks for your input,

Paul

TLDmobilerepair
 Posted 11/11/2010 12:39:02 PM
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Just found this, sounds like excatly the same issue....

http://autos.groups.yahoo.com/group/VAG-COM/message/26088

Robski
 Posted 11/11/2010 2:13:13 PM
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translated from Dutch.........

17961 P1553
com intake manifold absolute pressure sensor / barometric pressure sensor (F96) ratio outside specifications
Höhengeber du Signal (F96) / Saugrohrdruck unplausibles Verhältnis
and Barometric Pressure Sensor (F96) / Manifold Pressure Signal out of range ratio
Additional information on the error codes. Intermittent

Possible causes:
Leak at inlet or outlet
EGR system
Valve activated carbon fuel vapor extraction system
Wiring and / or plug connectors
Intake manifold absolute pressure sensor
Barometric Pressure Sensor (F96

Have you tried adapting EGR ?


Rob.

Scan it, Smoke it, Scope it....... Don't just poke & hope it © ™ BigGrin
TLDmobilerepair
 Posted 11/11/2010 10:53:26 PM
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Yes, tried adapting EGR & Throttle Body
TLDmobilerepair
 Posted 11/12/2010 8:59:47 AM
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Sorted now, I reset the ecu to factory settings then adapted the throttle body and egr. Left it idling for ten minutes. Took it for a good ten mile spin and it seems sweet as a nut.

Smile


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