What does code P2855 mean?

Q: What does code P2855 mean?

Clutch A Pressure Charge Performance. P2855 indicates that the transmission control module (TCM) has detected a performance problem with the pressure charge for clutch A, meaning the clutch is not engaging or holding as commanded. The TCM monitors hydraulic pressure and clutch slip, and when the measured response deviates from the expected value, it sets this code and typically illuminates the warning light.

DTC codes / P28xx · Transmission / P2855

P2855Clutch A Pressure Charge Performance

P2855 indicates that the transmission control module (TCM) has detected a performance problem with the pressure charge for clutch A, meaning the clutch is not engaging or holding as commanded. The TCM monitors hydraulic pressure and clutch slip, and when the measured response deviates from the expected value, it sets this code and typically illuminates the warning light.

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.