What does code P1631 mean?

Q: What does code P1631 mean?

Accelerator Pedal Position Sensor 1 Signal Too High. P1631 on Volkswagen vehicles means the engine control module (ECM) has detected an abnormally high voltage on the signal circuit from accelerator pedal position sensor 1, which typically indicates a short to voltage or an open ground reference. The ECM compares this signal against sensor 2 and expects a specific relationship, so a signal that stays too high will trigger the code and often force the engine into a reduced-power limp mode.

DTC codes / Volkswagen codes / P1631

P1631 · VolkswagenAccelerator Pedal Position Sensor 1 Signal Too High

P1631 on Volkswagen vehicles means the engine control module (ECM) has detected an abnormally high voltage on the signal circuit from accelerator pedal position sensor 1, which typically indicates a short to voltage or an open ground reference. The ECM compares this signal against sensor 2 and expects a specific relationship, so a signal that stays too high will trigger the code and often force the engine into a reduced-power limp mode.

SystemPowertrain

Code typeVolkswagen specific

SeverityMedium

Fix difficultyIntermediate

AreaComputer and output circuits

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