What does code P285B mean?

Q: What does code P285B mean?

Shift Fork A Actuator Circuit/Open. P285B indicates that the transmission control module has detected an open circuit in the electrical path for the Shift Fork A actuator, which is part of an automated manual or dual-clutch transmission's shift mechanism. The computer commands the actuator to move but sees no current flow or an unexpected voltage drop, so it flags the circuit as open and may disable the affected gear range.

DTC codes / P28xx · Transmission / P285B

P285BShift Fork A Actuator Circuit/Open

P285B indicates that the transmission control module has detected an open circuit in the electrical path for the Shift Fork A actuator, which is part of an automated manual or dual-clutch transmission's shift mechanism. The computer commands the actuator to move but sees no current flow or an unexpected voltage drop, so it flags the circuit as open and may disable the affected gear range.

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.