What does code P25E4 mean?

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P25E4

P25E4B Camshaft Position - Unable to Achieve Locked Position Bank 1

P25E4 indicates that the engine control module (ECM) has commanded the bank 1 'B' camshaft phaser to its locked position but the camshaft did not respond as expected. The ECM monitors camshaft position relative to the crankshaft and sets this code when the phaser fails to achieve or maintain the locked position within a calibrated time or deviation threshold.

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.