What does code P284F mean?

Q: What does code P284F mean?

Shift Fork C Unrequested Movement. P284F means the transmission control module (TCM) commanded shift fork C to a specific position, but the fork moved when it was not told to, or it failed to stay where commanded. The TCM compares the fork's actual position from its sensor against the commanded position and sets this code when unrequested movement is detected.

DTC codes / P28xx · Transmission / P284F

P284FShift Fork C Unrequested Movement

P284F means the transmission control module (TCM) commanded shift fork C to a specific position, but the fork moved when it was not told to, or it failed to stay where commanded. The TCM compares the fork's actual position from its sensor against the commanded position and sets this code when unrequested movement is detected.

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.