What does code P28E1 mean?

Q: What does code P28E1 mean?

Shift Motor Phase U-V-W Circuit High. P28E1 indicates that the powertrain control module has detected an abnormally high voltage on the phase U-V-W circuit that feeds the shift motor, which is the electric actuator used in some automated manual or dual-clutch transmissions to select gears. The circuit is expected to operate within a specific voltage window, and a high reading typically points to an open circuit, a short to power, or a faulty motor winding.

DTC codes / P28xx · Transmission / P28E1

P28E1Shift Motor Phase U-V-W Circuit High

P28E1 indicates that the powertrain control module has detected an abnormally high voltage on the phase U-V-W circuit that feeds the shift motor, which is the electric actuator used in some automated manual or dual-clutch transmissions to select gears. The circuit is expected to operate within a specific voltage window, and a high reading typically points to an open circuit, a short to power, or a faulty motor winding.

SystemPowertrain

Code typeGeneric (all makes)

SeverityHigh

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.