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Ford Focus 2007 p2138 p2125 codes

Posted By Cmcb1985 Sunday, February 03, 2019 10:57:36 AM
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Cmcb1985
 Posted Sunday, February 03, 2019 10:57:36 AM
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Hi all. Looking for a bit of help with my 2007 1.6 petrol focus.

My problems started when my instrument cluster went haywire and was showing a load of random letters and numbers where the mileometer is. I sent this away to be refurbished and got it back with the problem gone.

Soon after it developed another fault where it had a message on the display saying reduced acceleration and had a couple of fault codes stored on the ecu. P2138 and p2125 which suggested a problem with the throttle body and accelerator pedal. I replaced both these items and had no joy.

I did a further diagnostic and got the code p2108 powertrain control module monitor fault. Along with a load of other fault codes including the p2138 and p2125. This led me to believe the fault was in the powertrain control module (ecu) so I sent this off for testing. It came back with no faults found.

Another code I had was p060a internal control module fault. I tried another internal control module in the car with a matching serial number and the car still has the same faults showing.

Even with all these codes and faults the car starts and drives but does hesitate sometimes. I am really struggling to get to the bottom of this issue so any help is appreciated. Apologies for the long thread but thought I’d add al info I can.

Robski
 Posted Sunday, February 03, 2019 12:59:22 PM
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DTC's read with what ?

Live data ?

Actual testing ?


Rob.
Cmcb1985
 Posted Monday, February 04, 2019 5:04:09 AM
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Hi robski I have read the dtc’s using Delphi software. I haven’t got any live data because not sure what to look for with this fault. Any pointers will be appreciated.
Robski
 Posted Monday, February 04, 2019 6:20:34 AM
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let's start with the DTC descriptions ............

Rob.
Cmcb1985
 Posted Monday, February 04, 2019 6:46:03 AM
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Is there a way I can post photos on here and I can show you what has been shown on the screen.
K And R
 Posted Monday, February 04, 2019 11:35:02 AM
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c

Yes use an attach button but it,s normally better to type them as photos can some time be fuzzy.

Kev.


"If you dont KNOW how it works, don,t try to test or fix it"
Andy-01
 Posted Monday, February 04, 2019 2:00:48 PM
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P2138 - Throttle/Pedal Position Sensor/Switch D / E Voltage Correlation
P2125 - Throttle/Pedal Position Sensor/Switch E Circuit
P2108 - THROTTLE ACTUATOR CONTROL MODULE PERFORMANCE
P060A - Internal Cntl Module Monitoring Proc'r Performance

So, so far I can see all of the above being thrown into the mix.
Clear codes, reproduce concern again, what resets ?

Keeping with the basics initially, the last two can get set by an aging battery allowing electrical noise into the system.
Is it original battery on the vehicle, and if no, is it the correct battery for the vehicle ?

The first two codes are 100% pedal circuit codes.
P2125 pointing to the PWM signal from track 2, and P2128 just being the correlation code reporting the signals from the two tracks don't match !


The PWM signal is passed direct to the Cluster, through our old friend connector C112.
The analogue signal from the pedal is passed to the PCM, via C90, and C113.

All three of these connectors are weak points, and I have written about the locations and required reworks a few times on here, so if you do a search of the forum for them you should find the info.

Start with those connectors, and battery check, next.

Andy
Robski
 Posted Monday, February 04, 2019 2:19:19 PM
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Rob.
Cmcb1985
 Posted Friday, February 08, 2019 10:12:25 AM
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Hi Andy

Sorry for the late reply. The battery is less than a year old and has been fully charged and also I have tried swapping it for another known good battery and I still have these codes. After a reset the two I seem to get every time are the pedal related ones. I will reset the codes again over the weekend and see what I get.

I will have a look for your rework guides on here for those connections as it seems like that will be the fault.

It makes more sense that it communicates through the cluster as I am getting off things happening on the cluster now and again like the fuel computer will say there is none in it then go to half a tank and the orange and red lights are on.

Thanks for all the help it’s appreciated.
Andy-01
 Posted Friday, February 08, 2019 1:40:18 PM
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All symptoms of the dreaded connectors !

Ok, one last time.

C90 - The big one in the middle of the battery junction box.
C111 & C112 - The two big connectors behind the left kick panel.
C113 - This is the one that gets missed ! Take the glove box out, and its up in the corner where the left A Pillar comes down.
However, its under the sound insulation !
Feel around and you will find it.
Put a knife cut through the insulation, and feed it through.

By eye, you rarely see any issues with the connectors, but don't be fooled.
What I do is apply a small amount of contact grease, and then use two cable ties in a cross around the plug, and pull up as tight as possible.

You cant cable tie C90 due to its construction, so a visual check and contact grease.

Then test for the issues again.

If it faults again, come back with detailed symptoms and a fresh code list please.

Andy

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