What does code P0931 mean?

Q: What does code P0931 mean?

Gear Shift Lock Solenoid Control Circuit High. P0931 means the transmission control module (TCM) has detected an abnormally high voltage on the control circuit for the gear shift lock solenoid, which is the device that prevents the shifter from moving out of Park unless the brake pedal is pressed. The TCM expects a specific voltage range on that circuit and flags the code when the signal exceeds the upper limit, indicating a short to power, an open ground, or a faulty solenoid.

DTC codes / P09xx · Transmission / P0931

P0931Gear Shift Lock Solenoid Control Circuit High

P0931 means the transmission control module (TCM) has detected an abnormally high voltage on the control circuit for the gear shift lock solenoid, which is the device that prevents the shifter from moving out of Park unless the brake pedal is pressed. The TCM expects a specific voltage range on that circuit and flags the code when the signal exceeds the upper limit, indicating a short to power, an open ground, or a faulty solenoid.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaTransmission

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