OBD-II code · Powertrain (generic, extended)
P25F2 Turbocharger/Supercharger Boost Sensor C Circuit
A third boost pressure sensor (C) used on twin-stage or sequential boost systems returns no usable signal. Without it, boost control of the third stage runs open-loop or is disabled.
Is it safe to drive with P25F2?
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 or broken signal wire
- PossibleCorroded connector at sensor pigtail
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
- P0239Turbocharger/Supercharger Boost Sensor B Circuit
- P25EFVacuum Pump Control Circuit B Range/Performance
- P25F0Vacuum Pump Control Circuit B Low
- P25F1Vacuum Pump Control Circuit B High
- P25F3Turbocharger/Supercharger Boost Sensor C Circuit Range/Performance
- P25F4Turbocharger/Supercharger Boost Sensor C Circuit Low
- P25F5Turbocharger/Supercharger Boost Sensor C Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.