OBD-II code · Powertrain (generic)
P091A Gear Shift Position Circuit B
The gear shift position circuit B reports a circuit fault. Gear shift position feedback is unreliable on this channel.
Is it safe to drive with P091A?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyPosition sensor failed
- PossibleWiring fault
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
- Gear Shift Position Sensor B, Wiring Harness, Tcm
Related codes
- P0914Gear Shift Position Circuit A
- P095AGear Shift Position Circuit C
- P0917Gear Shift Position Circuit High A
- P0918Gear Shift Position Circuit Intermittent A
- P0919Gear Shift Position Control Error
- P091BGear Shift Position Circuit Range/Performance B
- P091CGear Shift Position Circuit Low B
- P091DGear Shift Position Circuit High B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.