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P2138 Diagnostic Trouble Code Discussion for February 2010

Accelerator Position Sensor 1-2 Correlation


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Trouble Ticket Help Requests for DTC P2138
Help Request Posted
2004 Chevrolet Silverado 3500 6.6L codes VIN: 1GCJC33264
P2138: Accelerator Pedal Position Sensor 1-2 Correlation Error. ... with p2122,p2138,and p2139 codes.No driveability problem that I know of.With volt meter I have 5 vref and grounds at the app sensor plug when it is plugged up and unplugged..On scan tool when connector is plugged into sensor I have signals ; APP 1 .69 volt...
February 08, 2010
2007 Saturn Ion-2 2.2L Reduced power mode VIN: 1G8AJ55FX7
P2138: Accelerator Pedal Position Sensor 1-2 Correlation Error. TAC system keeps setting P2138 with a reduced voltage on APP1. With a new APP and system working we were able to record a scope pattern that shows APP1 almost always double the APP2 voltage. When it fails, sets code, and is in power reduction mode, the APP1 st...
February 15, 2010
2004 Chevrolet Silverado 3500 6.6L codes VIN: 1GCJC33264
P2138: Accelerator Pedal Position Sensor 1-2 Correlation Error. ... with p2122,p2138,and p2139 codes.No driveability problem that I know of.With volt meter I have 5 vref and grounds at the app sensor plug when it is plugged up and unplugged..On scan tool when connector is plugged into sensor I have signals ; APP 1 .69 volt...
February 08, 2010
2007 Saturn Ion-2 2.2L Reduced power mode VIN: 1G8AJ55FX7
P2138: Accelerator Pedal Position Sensor 1-2 Correlation Error. TAC system keeps setting P2138 with a reduced voltage on APP1. With a new APP and system working we were able to record a scope pattern that shows APP1 almost always double the APP2 voltage. When it fails, sets code, and is in power reduction mode, the APP1 st...
February 15, 2010