What does code P251D mean?

Q: What does code P251D mean?

PTO Engine Shutdown Circuit/Open. P251D indicates that the powertrain control module (PCM) has detected an open circuit in the power take-off (PTO) engine shutdown circuit, which is used to remotely or automatically shut down the engine when PTO equipment is active. The PCM monitors the circuit for expected voltage or continuity and sets this code when the signal is missing or out of range.

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P251D

P251DPTO Engine Shutdown Circuit/Open

P251D indicates that the powertrain control module (PCM) has detected an open circuit in the power take-off (PTO) engine shutdown circuit, which is used to remotely or automatically shut down the engine when PTO equipment is active. The PCM monitors the circuit for expected voltage or continuity and sets this code when the signal is missing or out of range.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.