OBD-II code · Powertrain (generic)
P091D Gear Shift Position Circuit High B
The gear shift position circuit B reports a circuit high fault. Gear shift position feedback is unreliable on this channel.
Is it safe to drive with P091D?
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 pins corroded - high contact resistance
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
- P0917Gear Shift Position Circuit High A
- P095DGear Shift Position Circuit High C
- P091AGear Shift Position Circuit B
- P091BGear Shift Position Circuit Range/Performance B
- P091CGear Shift Position Circuit Low B
- P0920Gear Shift Forward Actuator Circuit/Open
- P0921Gear Shift Forward Actuator Circuit Range/Performance
- P0922Gear Shift Forward Actuator Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.