Code result
P25FC
Turbocharger/Supercharger Bypass Valve C - Mechanical
Moderate severity
What it means
The third bypass valve is mechanically jammed. Solenoid is energised correctly but the valve flap or disc does not move as expected.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Carbon buildup blocks the valve flap
highOne of the most commonly reported causes for this code — check this first.
Actuator linkage seized by corrosion
mediumA plausible cause — test and verify before replacing parts.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P25FC freeNo credit card required