P2AB8Wastegate Position Sensor A 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
- P2AB8 means the wastegate A position signal has fallen below its valid floor, which points to a short to ground, an open signal or reference wire, or a dead sensor. GM's 2019 tables for the 2.7L L3B read the sensor as a percentage of its reference and fail below 5 % in 30 of 38 samples taken every 100 ms; the 2025 tables use below 1 % in 10 of 12. Both run only outside cranking with powertrain relay voltage of at least 11 V and are Type A, so the lamp lights in the first trip. Ford's 2020-23 gasoline summary sets it under 0.50 V after 4 s. Stellantis case S2308000121 traces P2AB8 with P0245 on the Jeep Wrangler to a pinched harness between turbo and intake hose. P2AB9 is the high side, P2ABB bank 2.
- What you may notice
- Check engine light from the first trip
- Reduced power because boost control is restricted
- May appear together with P0245 when a shared harness section is damaged
- Likely causes
- LikelySensor harness pinched or chafed between turbocharger and intake hose (short to ground)
- PossibleOpen reference or signal wire, or pushed-out terminal in the actuator connector
- PossiblePosition sensor inside the electric actuator 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.