What does code P281B mean?

Q: What does code P281B mean?

Pressure Control Solenoid H Control Circuit/Open. P281B indicates that the transmission control module (TCM) has detected an open circuit or loss of continuity in the control circuit for pressure control solenoid H, which is one of several solenoids used to regulate hydraulic pressure inside the automatic transmission. The TCM commands a specific current to the solenoid and monitors the circuit for expected electrical behavior; when the circuit is open, the solenoid cannot receive the command, and the TCM sets this code while typically placing the transmission in a limp-home mode.

DTC codes / P28xx · Transmission / P281B

P281BPressure Control Solenoid H Control Circuit/Open

P281B indicates that the transmission control module (TCM) has detected an open circuit or loss of continuity in the control circuit for pressure control solenoid H, which is one of several solenoids used to regulate hydraulic pressure inside the automatic transmission. The TCM commands a specific current to the solenoid and monitors the circuit for expected electrical behavior; when the circuit is open, the solenoid cannot receive the command, and the TCM sets this code while typically placing the transmission in a limp-home mode.

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.