P2ABCWastegate Position Sensor B Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2ABC is the high-voltage fault on the wastegate B position sensor: according to Ford's 2020-23 gasoline summary the input sits above 4.50 V for 4 s, a picture typical of a signal line shorted to the reference supply or an open sensor ground. On the 2.7L F-150 of model years 2021-22 Ford blames false P2ABC entries on calibration and fixes them by reprogramming the PCM (TSB 22-2357); TSB 23-2353 and SSM 54083 add it for the 3.5L V6 in F-150 and Expedition/Navigator. Since the driver cannot tell a sensor fault from a sticking flap, both show up as lower power or a fault light. Heat and vibration at the turbine housing loosen terminals, so the actuator connector deserves the first look. P2ABB is the low side, P2AB9 the same fault on turbo A.
- What you may notice
- Check engine light, on Ford possibly the wrench indicator
- Reduced power under load
- Likely causes
- PossiblePCM calibration that sets the code falsely (Ford reflash for listed models)
- PossibleOpen sensor ground or heat-damaged terminal at the actuator
- PossibleSignal wire shorted to the reference supply or battery voltage
- 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: €0 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.