What does code P1273 mean?

Q: What does code P1273 mean?

Accelerator Pedal Position Sensor 1. P1273 on GM vehicles indicates that the engine control module (ECM) has detected an out-of-range or implausible signal from Accelerator Pedal Position (APP) Sensor 1, which is part of the electronic throttle control system. The ECM compares APP sensor 1 voltage against expected values and often cross-checks it with APP sensor 2; when the signal falls outside the calibrated range or disagrees with the second sensor, the ECM stores this code and typically limits engine power to a reduced level.

DTC codes / GM codes / P1273

P1273 · GMAccelerator Pedal Position Sensor 1

P1273 on GM vehicles indicates that the engine control module (ECM) has detected an out-of-range or implausible signal from Accelerator Pedal Position (APP) Sensor 1, which is part of the electronic throttle control system. The ECM compares APP sensor 1 voltage against expected values and often cross-checks it with APP sensor 2; when the signal falls outside the calibrated range or disagrees with the second sensor, the ECM stores this code and typically limits engine power to a reduced level.

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.