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P1271 Diagnostic Trouble Code Discussion for March 2011

Air Fuel Sensor (Bank 1 Sensor 1) Circuit No Activity

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Trouble Ticket Help Requests for DTC P1271
Help Request Posted
2002 GMC Envoy SLT 4.2L MIL Lamp on, Reduced Power Light VIN: 1GKDT13S52
P1271: Accelerator Pedal Position Sensor 1-2 Correlation. I have replaced the APP connector and The Throttle Body connector. I have also load tested the wiring from the APP to the PCM and the Throttle Body to the PCM, the all carry a load using a headlight bulb and the voltage drop was .02V. I am leaning toward the P...
March 25, 2011