What does code P28C5 mean?

Q: What does code P28C5 mean?

Clutch A Phase U-V-W Circuit High. P28C5 indicates that the transmission control module (TCM) or hybrid control module has detected an abnormally high voltage on the phase U, V, or W circuit associated with clutch A, which typically points to an open circuit, poor connection, or internal fault in the clutch actuator or wiring. The computer monitors the voltage on these circuits and flags the code when the signal exceeds the expected range for the given operating conditions.

DTC codes / P28xx · Transmission / P28C5

P28C5Clutch A Phase U-V-W Circuit High

P28C5 indicates that the transmission control module (TCM) or hybrid control module has detected an abnormally high voltage on the phase U, V, or W circuit associated with clutch A, which typically points to an open circuit, poor connection, or internal fault in the clutch actuator or wiring. The computer monitors the voltage on these circuits and flags the code when the signal exceeds the expected range for the given operating conditions.

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.