P01FCTurbocharger Outlet Pressure Sensor B Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- Turbocharger outlet pressure sensor B is a second pressure sensor at a compressor outlet – for example one per turbo on twin-turbo engines or a second measuring point; sensor A has the codes P00F8–P00FC. It is a separate family from the boost pressure sensor: GM and Ford report the pressure ahead of the throttle under the boost sensor codes P0236–P0238. No manufacturer using the sensor B codes was found; FCA documents sensor A and a second outlet sensor. P01FC means the signal voltage stays below its lower limit – usually a signal wire shorted to ground or a missing 5 V reference. For comparison, GM sets its boost sensor low code below 14.4 % of 5 V, Ford below 0.19 V for 5 s.
- What you may notice
- Check engine light on
- Loss of power, boost limited
- Limp mode possible
- Likely causes
- LikelySignal wire shorted to ground
- Possible5 V reference open or shorted
- PossibleSensor faulty internally
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.