What does code P25D1 mean?

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P25D1

P25D1Exhaust Camshaft Actuator Park Lock Control Circuit Low Bank 1

P25D1 indicates that the powertrain control module has detected an abnormally low voltage or current on the control circuit for the exhaust camshaft actuator park lock on bank 1. The park lock is a mechanical latching mechanism that holds the exhaust camshaft in a fixed position when the engine is off, and the circuit is responsible for commanding it to release or engage. A low condition means the circuit is likely shorted to ground, has excessive resistance, or the actuator itself has failed.

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.