OBD-II code · Powertrain (generic)
P01FC Turbocharger Outlet Pressure Sensor B Circuit Low
Turbo outlet pressure sensor B signal voltage below expected range. Boost control tracks commanded vs. actual manifold pressure; persistent deviation means wastegate, vanes, hose or actuator are not delivering the requested pressure.
Is it safe to drive with P01FC?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal wire shorted to ground
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
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
- Likely to fail
- Parts involved
- Turbo Outlet Pressure Sensor B, Sensor Wiring
Related codes
- P00FATurbocharger Outlet Pressure Sensor A Circuit Low
- P01F9Engine Coolant Heater B Control Circuit Driver Current/Temperature Too High
- P01FATurbocharger Outlet Pressure Sensor B Circuit
- P01FBTurbocharger Outlet Pressure Sensor B Range/Performance
- P01FDTurbocharger Outlet Pressure Sensor B Circuit High
- P01FETurbocharger Outlet Pressure Sensor B Intermittent/Erratic
- P01FFTurbocharger Outlet Pressure Sensor A/B Correlation
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.