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P1271 Diagnostic Trouble Code Discussion for May 2008

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


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Trouble Ticket Help Requests for DTC P1271
Help Request Posted
2003 Chevrolet Trailblazer North Face 4.2L Hesitation VIN: 1GNDT13S53
P1271: Accelerator Pedal Position Sensor 1-2 Correlation. Came in with check engine & power reduction lights on. Had codes 1280 & 1271. Ran diagnostic charts & said to replace computer. We hooked lab scope up to sensor #2 for gas pedal(signal wire) & we get a "square wave" on the line. Sensor ...
May 20, 2008
2003 Chevrolet Trailblazer North Face 4.2L Hesitation VIN: 1GNDT13S53
P1271: Accelerator Pedal Position Sensor 1-2 Correlation. Came in with check engine & power reduction lights on. Had codes 1280 & 1271. Ran diagnostic charts & said to replace computer. We hooked lab scope up to sensor #2 for gas pedal(signal wire) & we get a "square wave" on the line. Sensor ...
May 20, 2008