What does code P284E mean?

Q: What does code P284E mean?

Shift Fork B Unrequested Movement. P284E indicates that the transmission control module (TCM) has detected unrequested movement of shift fork B, meaning the fork has moved from its commanded position without a corresponding actuator command. The TCM typically compares the fork's actual position from a position sensor against the commanded position and sets this code when the deviation exceeds a calibrated threshold.

DTC codes / P28xx · Transmission / P284E

P284EShift Fork B Unrequested Movement

P284E indicates that the transmission control module (TCM) has detected unrequested movement of shift fork B, meaning the fork has moved from its commanded position without a corresponding actuator command. The TCM typically compares the fork's actual position from a position sensor against the commanded position and sets this code when the deviation exceeds a calibrated threshold.

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.