What does code P2878 mean?

Q: What does code P2878 mean?

Clutch B Disengagement Time Too Fast. P2878 is a manufacturer-specific transmission code indicating that the transmission control module (TCM) has detected the clutch B disengagement time is faster than the calibrated expected value. The TCM monitors the time it takes for clutch B to release during a shift or engagement event, and when that time falls below the minimum threshold, it flags this code because the clutch is releasing too quickly, which can cause harsh engagement or slipping.

DTC codes / P28xx · Transmission / P2878

P2878Clutch B Disengagement Time Too Fast

P2878 is a manufacturer-specific transmission code indicating that the transmission control module (TCM) has detected the clutch B disengagement time is faster than the calibrated expected value. The TCM monitors the time it takes for clutch B to release during a shift or engagement event, and when that time falls below the minimum threshold, it flags this code because the clutch is releasing too quickly, which can cause harsh engagement or slipping.

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.