OBD-II code · Powertrain (generic, extended)
P25FD Turbocharger/Supercharger Bypass Valve C Temperature Too High
The third bypass valve has reached over-temperature. Either coil duty cycle is too high for too long, or cooling air flow around the valve is restricted.
Is it safe to drive with P25FD?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelySustained high duty cycle from charge balancing strategy
- PossibleCooling air channel blocked by debris
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–5 h
- Emissions test
- Usually unaffected
- Parts involved
- Bypass Valve C, Bypass Solenoid
Related codes
- P00D7Turbocharger/Supercharger Bypass Valve A Temperature Too High
- P00D8Turbocharger/Supercharger Bypass Valve B Temperature Too High
- P25FATurbocharger/Supercharger Bypass Valve C Control Circuit High
- P25FBTurbocharger/Supercharger Bypass Valve C Control Circuit Range/Performance
- P25FCTurbocharger/Supercharger Bypass Valve C - Mechanical
- P25FESupercharger Disconnect Clutch
- P25FFElectrical System Voltage Stabilizer Control Module Performance
- P2600Coolant Pump A Control Circuit / Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.