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P2138 Diagnostic Trouble Code Discussion for April 2009

Accelerator Position Sensor 1-2 Correlation

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Trouble Ticket Help Requests for DTC P2138
Help Request Posted
2004 Cadillac CTS 3.6L MIL Lamp on VIN: 1G6DM57704
P2138: Accelerator Pedal Position Sensor 1-2 Correlation Error. ... revs fine in park and neutral. Saw the GM TSB on throttle body and pigtail replacement but don't think this is the issue. Engine has run fine under load that seemed to be intermittent but now no power and MIL when in gear. Made repair to ground initially w...
April 06, 2009