OBD-II code · Powertrain (generic, extended)
P25F3 Turbocharger/Supercharger Boost Sensor C Circuit Range/Performance
The third boost pressure sensor reading is implausible compared with manifold pressure or commanded boost. Either drift, leak in the sensing line, or contamination on the sensor diaphragm.
Is it safe to drive with P25F3?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- PossibleSensor drift after thermal aging
- PossibleSensing hose blocked by oil residue
- Less likelySensor element aged beyond calibration window
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, Sensing Line
Related codes
- P0240Turbocharger/Supercharger Boost Sensor B Circuit Range/Performance
- P2CD7Turbocharger/Supercharger Boost Sensor D Circuit Range/Performance
- P25F0Vacuum Pump Control Circuit B Low
- P25F1Vacuum Pump Control Circuit B High
- P25F2Turbocharger/Supercharger Boost Sensor C Circuit
- P25F4Turbocharger/Supercharger Boost Sensor C Circuit Low
- P25F5Turbocharger/Supercharger Boost Sensor C Circuit High
- P25F6AIR System B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.