What does code P1271 mean?

Q: What does code P1271 mean?

Accelerator Pedal Position Sensor 1-2 Correlation. P1271 on a GM vehicle means the engine control module (ECM) has compared the two independent signal voltages from the accelerator pedal position (APP) sensor and found they do not agree within the expected margin. The ECM expects APP sensor 1 and sensor 2 to track each other in a predictable relationship, and this code sets when that correlation is lost.

DTC codes / GM codes / P1271

P1271 · GMAccelerator Pedal Position Sensor 1-2 Correlation

P1271 on a GM vehicle means the engine control module (ECM) has compared the two independent signal voltages from the accelerator pedal position (APP) sensor and found they do not agree within the expected margin. The ECM expects APP sensor 1 and sensor 2 to track each other in a predictable relationship, and this code sets when that correlation is lost.

SystemPowertrain

Code typeGM specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

Guidance is general and written for GM vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.