P08B0Neutral Position Sensor B Circuit High
- Generic OBD-II code · Powertrain
- How the car detects it
- P08B0 reports that the signal of neutral position sensor B on a manual gearbox is above its upper electrical limit. With a three-wire Hall sensor this usually points to an open signal or ground wire or a short to voltage. No manufacturer documents P08B0 publicly. For the A sensor Audi does: the 2019–20 Q3 and 2022–23 A3 store P086D/P086E because the wires to sender G701 were too short and were pulled apart by shifting, fixed by lengthening them 20 mm; the same harness logic applies to a B sensor. A GM patent explains the dual-Hall neutral sensor with PWM output. CARB 1968.2 (e)(15) requires circuit monitoring. Low is P08AF; start-stop is typically off.
- What you may notice
- Start-stop does not switch the engine off
- Start system warning in the cluster
- Fault may come and go with gear changes
- Likely causes
- LikelySignal or ground wire pulled apart, harness too short
- PossibleSignal wire shorted to voltage
- PossibleSensor B open internally
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.