P086ANeutral Position Sensor A Circuit/Open
- 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. P086A is the circuit fault: the signal is missing, typically an open supply or signal wire. Audi's bulletin for the sister codes P086D/P086E found the supply wires to G701 too short and lengthened them. Start-stop stays off.
- What you may notice
- Start-stop not working
- Warning about the start system
- MIL possible depending on maker
- Likely causes
- LikelyWire or connector to the sensor open or chafed
- PossibleSensor faulty
- PossibleCorroded connector low on the gearbox
- RareSupply output of the control module
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.