What does code P25D4 mean?

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P25D4

P25D4Exhaust Camshaft Actuator Park Lock Control Circuit Low Bank 2

P25D4 indicates that the powertrain control module has detected a low-voltage condition on the control circuit for the exhaust camshaft actuator park lock on bank 2. The park lock is a mechanical pin that secures the camshaft phaser when the engine is off, and the circuit's low voltage signals a problem with the wiring, connector, or actuator solenoid itself.

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.