What does code P28C8 mean?

Q: What does code P28C8 mean?

Clutch A Pump Motor Performance. P28C8 indicates that the transmission control module (TCM) has detected a performance fault in the electric pump motor that supplies hydraulic pressure for clutch A, which is typically the clutch that engages the even-numbered gears in a dual-clutch transmission. The computer monitors the pump motor's electrical current and speed feedback, and it sets this code when the motor does not respond as expected during a commanded activation, such as a pre-drive prime or a clutch apply event.

DTC codes / P28xx · Transmission / P28C8

P28C8Clutch A Pump Motor Performance

P28C8 indicates that the transmission control module (TCM) has detected a performance fault in the electric pump motor that supplies hydraulic pressure for clutch A, which is typically the clutch that engages the even-numbered gears in a dual-clutch transmission. The computer monitors the pump motor's electrical current and speed feedback, and it sets this code when the motor does not respond as expected during a commanded activation, such as a pre-drive prime or a clutch apply event.

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.