What does code P25F8 mean?

Q: What does code P25F8 mean?

Turbocharger/Supercharger Bypass Valve C Control Circuit. P25F8 indicates that the powertrain control module (PCM) has detected an electrical fault in the control circuit for the bypass valve on the secondary turbocharger or supercharger, designated as valve C. The PCM monitors the circuit for expected voltage or current and sets this code when the signal is out of range, which can prevent the valve from opening or closing on command.

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P25F8

P25F8Turbocharger/Supercharger Bypass Valve C Control Circuit

P25F8 indicates that the powertrain control module (PCM) has detected an electrical fault in the control circuit for the bypass valve on the secondary turbocharger or supercharger, designated as valve C. The PCM monitors the circuit for expected voltage or current and sets this code when the signal is out of range, which can prevent the valve from opening or closing on command.

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.