What does code P28E0 mean?

Q: What does code P28E0 mean?

Shift Motor Phase U-V-W Circuit Low. P28E0 means the transmission control module (TCM) has detected an abnormally low voltage on the phase U-V-W circuit that feeds the shift motor, which is the electric actuator responsible for changing gears in certain automated manual and dual-clutch transmissions. The TCM monitors the motor's three-phase wiring for expected voltage patterns, and a low reading on any phase indicates a short to ground, a damaged winding, or a wiring fault that prevents the motor from receiving full power.

DTC codes / P28xx · Transmission / P28E0

P28E0Shift Motor Phase U-V-W Circuit Low

P28E0 means the transmission control module (TCM) has detected an abnormally low voltage on the phase U-V-W circuit that feeds the shift motor, which is the electric actuator responsible for changing gears in certain automated manual and dual-clutch transmissions. The TCM monitors the motor's three-phase wiring for expected voltage patterns, and a low reading on any phase indicates a short to ground, a damaged winding, or a wiring fault that prevents the motor from receiving full power.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

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.