What does code P1639 mean?

Q: What does code P1639 mean?

Accelerator Pedal Position Sensor 1/2 Range Performance. P1639 on Volkswagen vehicles indicates that the engine control module (ECM) has detected an implausible or out-of-range relationship between the two accelerator pedal position sensors. The ECM compares the signals from sensor 1 and sensor 2, which are designed to track together but with opposite voltage sweeps, and sets this code when their readings do not correlate within the expected tolerance.

DTC codes / Volkswagen codes / P1639

P1639 · VolkswagenAccelerator Pedal Position Sensor 1/2 Range Performance

P1639 on Volkswagen vehicles indicates that the engine control module (ECM) has detected an implausible or out-of-range relationship between the two accelerator pedal position sensors. The ECM compares the signals from sensor 1 and sensor 2, which are designed to track together but with opposite voltage sweeps, and sets this code when their readings do not correlate within the expected tolerance.

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.