P086BNeutral Position Sensor A Range/Performance
- Generic OBD-II code · Powertrain
- How the car detects it
- Neutral position sensor A is a position sensor, usually a three-wire Hall sensor, on the shift shaft of a manual gearbox. It tells the engine module that neutral is selected, which start-stop needs before it may switch the engine off. Analog versions need a learned neutral value (P086F). Audi uses it as sender G701 on Q3 and A3, GM on the 2019 Corvette ZR1 with its 7-speed manual, where these codes suspend the gear ratio checks. P086B means the signal is valid but implausible: it reports neutral although engine and road speed show a gear, never shows neutral, or lies outside the learned window. Patents describe learning neutral and rejecting unsteady runs.
- What you may notice
- Start-stop not working or behaving oddly
- Warning about start-stop or start system
- Likely causes
- LikelySensor or magnet target loose, misaligned or covered with metal debris
- PossibleLearned value missing or wrong after gearbox, clutch or sensor work
- PossibleSensor drifting
- RareContact resistance in the connector
- 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.