What does code P1272 mean?

Q: What does code P1272 mean?

Accelerator Pedal Position Sensor 2-3 Correlation. P1272 on GM vehicles indicates that the engine control module (ECM) has detected a disagreement between the two independent signals produced by the accelerator pedal position (APP) sensors, specifically sensor 2 and sensor 3. The ECM expects the two voltages to maintain a precise mathematical relationship as the pedal is pressed and released, and this code sets when that correlation falls outside the allowed tolerance for a calibrated amount of time.

DTC codes / GM codes / P1272

P1272 · GMAccelerator Pedal Position Sensor 2-3 Correlation

P1272 on GM vehicles indicates that the engine control module (ECM) has detected a disagreement between the two independent signals produced by the accelerator pedal position (APP) sensors, specifically sensor 2 and sensor 3. The ECM expects the two voltages to maintain a precise mathematical relationship as the pedal is pressed and released, and this code sets when that correlation falls outside the allowed tolerance for a calibrated amount of time.

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.