OBD-II code · Powertrain (generic)
P09A9 Gate Select Position Circuit C High
The gate select position circuit C reports a high fault. Selector gate position cannot be reliably measured on this channel.
Is it safe to drive with P09A9?
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
- Gate Select Position Sensor C, Wiring Harness, Tcm
Related codes
- P0907Gate Select Position Circuit A High
- P09A5Gate Select Position Circuit B High
- P09A6Gate Select Position Circuit C Circuit
- P09A7Gate Select Position Circuit C Range/Performance
- P09A8Gate Select Position Circuit C Low
- P0A00Motor Electronics Coolant Temperature Sensor Circuit
- P0A01Motor Electronics Coolant Temperature Sensor Range/Performance
- P0A02Motor Electronics Coolant Temperature Sensor Low Input
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.