What does code P0854 mean?

Q: What does code P0854 mean?

Drive Switch Input Circuit Low. P0854 means the powertrain control module (PCM) has detected a low voltage condition on the drive switch input circuit, which is the signal wire that tells the computer the transmission or transfer case is in drive or a drive-range position. The PCM expects to see a voltage within a specific range when the switch is closed, and a continuous low reading indicates a short to ground, an open circuit, or a failed switch.

DTC codes / P08xx · Transmission / P0854

P0854Drive Switch Input Circuit Low

P0854 means the powertrain control module (PCM) has detected a low voltage condition on the drive switch input circuit, which is the signal wire that tells the computer the transmission or transfer case is in drive or a drive-range position. The PCM expects to see a voltage within a specific range when the switch is closed, and a continuous low reading indicates a short to ground, an open circuit, or a failed switch.

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.