What does code P28D7 mean?

Q: What does code P28D7 mean?

Clutch B Pump Motor Performance. P28D7 indicates that the transmission control module (TCM) has detected a performance fault in the electric pump motor that supplies hydraulic pressure for clutch B, which is used to engage a specific gearset in dual-clutch or automatic transmissions. The TCM monitors the pump motor's electrical current and speed, and it sets this code when the motor fails to reach the commanded speed or draws current outside the expected range during a self-test or normal operation.

DTC codes / P28xx · Transmission / P28D7

P28D7Clutch B Pump Motor Performance

P28D7 indicates that the transmission control module (TCM) has detected a performance fault in the electric pump motor that supplies hydraulic pressure for clutch B, which is used to engage a specific gearset in dual-clutch or automatic transmissions. The TCM monitors the pump motor's electrical current and speed, and it sets this code when the motor fails to reach the commanded speed or draws current outside the expected range during a self-test or normal operation.

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.