OBD-II code · Powertrain (generic, extended)
P25F5 Turbocharger/Supercharger Boost Sensor C Circuit High
The third boost pressure sensor signal is above the upper diagnostic threshold. Common causes are an open sensor or a short to the 5 V reference.
Is it safe to drive with P25F5?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen sensor element
- PossibleSignal wire shorted to the 5 V reference
- Less likelyConnector pins corroded - high contact resistance
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
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Boost Pressure Sensor C, Wiring Harness
Related codes
- P0242Turbocharger/Supercharger Boost Sensor B Circuit High
- P25F2Turbocharger/Supercharger Boost Sensor C Circuit
- P25F3Turbocharger/Supercharger Boost Sensor C Circuit Range/Performance
- P25F4Turbocharger/Supercharger Boost Sensor C Circuit Low
- P25F6AIR System B
- P25F7AIR System B Incorrect Flow Detected
- P25F8Turbocharger/Supercharger Bypass Valve C Control Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.