P2ABBWastegate Position Sensor B Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2ABB reports that the position signal of the turbocharger B wastegate is too low, as a short to ground, a broken signal or supply wire or a failed sensor would cause. Ford's 2020-23 gasoline summary applies the same window as for turbo A and sets the code below 0.50 V after 4 s. In that document the threshold line for this sensor names sensor A, evidently an editing slip, since the heading and code title both refer to B. Ford lists P2ABB in TSB 23-2353 and SSM 54083 for twin-turbo applications such as the F-150 3.5L and Expedition/Navigator. The two GM tables reviewed here (2019 L3B, 2025) contain only the A codes. On a V6 the bank 2 flap can then no longer be positioned, so expect reduced boost and power. High is P2ABC, the bank 1 counterpart P2AB8.
- What you may notice
- Check engine light
- Less power, especially when accelerating hard
- Likely causes
- LikelySensor wire chafed to ground near the bank 2 turbocharger
- PossibleOpen reference supply or signal wire, loose connector
- PossiblePosition sensor in wastegate actuator B failed
- 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: €20 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.