Question about 2006 Pontiac Grand Prix
3.8L V6 Engine was overheating last week, I replaced the thermostat and all was well until today. First I received a "Reduced Engine Power" warning and the check engine light came on. Shortly after that another warning was displayed - "Service Traction System". I could feel the reduced power, as if a cylinder or two wasn't working. I got 3 different error codes : P1125, P2125, and P2138. All three point to the Accelerator Pedal Position Sensor. So my question is, where is the APP sensor located?
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Posted on Jan 02, 2017
There is a GM service bulletin on this particular item. basically covers both codes your getting.
#07-06-04-019A: Intermittent MIL/SES, DTC P2138 with Reduced Engine Power (Repair Instrument Panel (IP) to Body Harness Connector)
Models: 2005-2008 GM Passenger Cars and Light Duty Trucks (Including Saturn)
Posted on Jul 03, 2009
Have you ever had the catalytic converter changed. Over time the pellets inside will melt together and this will make the care very very sluggish like it does not want to run. You may want to try that.
Posted on Jul 06, 2009
SOURCE: I have a 2004 grand
i had a problem with all my lights coming on in my 2006 explore took it to dealer to find out that the battery was dying replaced it and they went away
Posted on Mar 26, 2011
SOURCE: '91 pontiac grand prix, 3.1
Hi, the only thing common between the fuel pump circuit and the ignition circuit is the ECM itself. Recommend you check the ECM fuse. Not sure if it's in the car or the engine compartment fuse box. If this isn't the problem, you may have 2 separate problems. Your car doesn't have passlock anti-theft does it?
Posted on Apr 03, 2011
SOURCE: 2005 Montana Sv6 3.5L on
Some customers may comment on an intermittent malfunction indicator lamp (MIL) being Illuminated with a message or an indicator that displays Reduced Engine Power.
The technician may observe on a scan tool DTC P2138 - Accelerator Pedal Position (APP) Sensor 1-2 Correlation set as Current or in History.
CauseThis condition may be caused by water intrusion into the instrument panel (IP) to body harness connector, which carries the APP sensor signals to the ECM/PCM. This water intrusion results in a voltage difference between APP Sensor 1 and APP Sensor 2 that exceeds a predetermined value for more than a calibrated period of time, setting P2138.
Note: Aftermarket equipment can generate DTC P2138 and/or other DTCs. This is as service bulletin I located. Is there any additional codes present.Would definitely check that harness connection for corrosion and is vehicle running poorly?
Posted on Jun 23, 2011
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