P01FDTurbocharger Outlet Pressure Sensor B Circuit High
- 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. P01FD means the signal voltage stays above its upper limit – typically an open signal or sensor ground (the input is pulled up) or a short to voltage. For comparison, GM sets its boost sensor high code above 86 % of 5 V, Ford above 4.88 V.
- What you may notice
- Check engine light on
- Loss of power, boost limited
- Limp mode possible
- Likely causes
- LikelySensor ground or signal wire open
- PossibleSignal shorted to 5 V or battery voltage
- PossibleSensor faulty
- 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.