OBD-II code · Powertrain (generic)
P08B1 Neutral Position Sensor B Circuit Intermittent/Erratic
The neutral position sensor B reports a circuit intermittent/erratic fault. Verification of true neutral position on the B channel is impaired.
Is it safe to drive with P08B1?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyPosition sensor failed
- PossibleWiring fault
- Less likelyConnector with intermittent contact under vibration
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Neutral Position Sensor B, Wiring Harness, Tcm
Related codes
- P086ENeutral Position Sensor A Circuit Intermittent/Erratic
- P08AENeutral Position Sensor B Circuit Range/Performance
- P08AFNeutral Position Sensor B Circuit Low
- P08B0Neutral Position Sensor B Circuit High
- P08B2Neutral Position Sensor A/B Correlation
- P08B3Neutral Position Sensor B Not Learned
- P08B4Clutch Pedal Position Sensor B Circuit/Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.