P08AENeutral Position Sensor B Circuit Range/Performance
- Generic OBD-II code · Powertrain
- How the car detects it
- Sensor B is the second neutral sensor or channel on the shift shaft of a manual gearbox, complementing sensor A (P086A ff). P08AE means its signal is electrically present but implausible: it stays outside the expected window, does not change when gears are engaged, or reports neutral while the gear ratio says otherwise. No manufacturer documents this code publicly; Audi's G701 and GM's LT5 Corvette are only known to use the A codes. Per a GM patent the neutral sensor is a Hall sensor pair with a PWM output that changes with every gear, so such a plausibility check is possible. CARB 1968.2 (e)(15) requires rationality monitoring of inputs. Start-stop is usually disabled; repair often means adjusting or replacing the sensor.
- What you may notice
- Start-stop unavailable
- Start system or gear indicator message in the cluster
- No noticeable change while driving
- Likely causes
- LikelySensor B or its magnet misaligned after gearbox work
- PossibleSensor B drifting or faulty
- RareWorn shift shaft or detent giving an unclear neutral position
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.