What does code P25D0 mean?

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P25D0

P25D0Exhaust Camshaft Actuator Park Lock Control Circuit / Open Bank 1

P25D0 indicates that the powertrain control module (PCM) has detected an open circuit or electrical fault in the park lock control circuit of the exhaust camshaft actuator on bank 1. The park lock function mechanically locks the camshaft phaser in a default position when the engine is off, and this code means the PCM cannot verify the actuator's commanded state due to a wiring or component issue.

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.