What does code P1270 mean?

Q: What does code P1270 mean?

Accelerator Pedal Position Sensor A/D Converter Error. P1270 on a GM vehicle means the engine control module (ECM) detected an internal analog-to-digital (A/D) conversion error while reading the accelerator pedal position (APP) sensor signal. The ECM compares redundant APP sensor voltages and their digitized values, and when the A/D converter cannot produce a valid reading, it stores this code and typically limits engine power.

DTC codes / GM codes / P1270

P1270 · GMAccelerator Pedal Position Sensor A/D Converter Error

P1270 on a GM vehicle means the engine control module (ECM) detected an internal analog-to-digital (A/D) conversion error while reading the accelerator pedal position (APP) sensor signal. The ECM compares redundant APP sensor voltages and their digitized values, and when the A/D converter cannot produce a valid reading, it stores this code and typically limits engine power.

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.