What does code P25FC mean?

Q: What does code P25FC mean?

Turbocharger/Supercharger Bypass Valve C - Mechanical. P25FC indicates that the powertrain control module (PCM) has detected a mechanical fault in the bypass valve circuit for turbocharger or supercharger system 'C'. The PCM monitors the valve's response to commanded changes and sets this code when the actual position or behavior does not match the expected mechanical operation, often due to a stuck or binding valve.

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P25FC

P25FCTurbocharger/Supercharger Bypass Valve C - Mechanical

P25FC indicates that the powertrain control module (PCM) has detected a mechanical fault in the bypass valve circuit for turbocharger or supercharger system 'C'. The PCM monitors the valve's response to commanded changes and sets this code when the actual position or behavior does not match the expected mechanical operation, often due to a stuck or binding valve.

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.