What does code P2861 mean?

Q: What does code P2861 mean?

Shift Fork B Actuator Circuit Low. P2861 indicates that the powertrain control module (PCM) or transmission control module (TCM) has detected an abnormally low voltage on the electrical circuit that controls the Shift Fork B actuator, which is part of an automated manual or dual-clutch transmission's shift mechanism. The computer expects a certain voltage range when commanding the actuator, and a reading below the threshold triggers this code, often pointing to a wiring fault, poor connection, or a failing actuator.

DTC codes / P28xx · Transmission / P2861

P2861Shift Fork B Actuator Circuit Low

P2861 indicates that the powertrain control module (PCM) or transmission control module (TCM) has detected an abnormally low voltage on the electrical circuit that controls the Shift Fork B actuator, which is part of an automated manual or dual-clutch transmission's shift mechanism. The computer expects a certain voltage range when commanding the actuator, and a reading below the threshold triggers this code, often pointing to a wiring fault, poor connection, or a failing actuator.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

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.