What does code P284B mean?

Q: What does code P284B mean?

Shift Fork C Stuck. P284B indicates that the transmission control module (TCM) has detected a stuck condition in shift fork C, which is part of a dual-clutch or automated manual transmission's internal shifting mechanism. The TCM monitors fork position and movement, and when the fork fails to move as commanded or remains in a position longer than expected, it sets this code.

DTC codes / P28xx · Transmission / P284B

P284BShift Fork C Stuck

P284B indicates that the transmission control module (TCM) has detected a stuck condition in shift fork C, which is part of a dual-clutch or automated manual transmission's internal shifting mechanism. The TCM monitors fork position and movement, and when the fork fails to move as commanded or remains in a position longer than expected, it sets this code.

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.