P09A6Gate Select Position Circuit C
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Electrical fault on a third gate select position signal (circuit C) that fits none of the more specific C codes. Public AMT designs show far fewer channels: Aisin AI and Isuzu use one select sensor, and a Mannesmann Sachs patent combines motor encoders with an extra neutral position sensor. What a third channel is in practice remains open. No manufacturer documents this code publicly. CARB requires circuit checks on such inputs. P09A7 to P09A9 are the plausibility, low and high faults of C; as with circuit B there is no intermittent variant. P0904 and P09A2 cover circuits A and B. Gear changes may be limited.
- What you may notice
- Check engine or transmission warning light on
- Delayed or missing gear changes
- Vehicle reluctant to pull away
- Likely causes
- LikelyLoose, corroded or wet connector at the select sensor or actuator unit
- PossibleDamaged signal wire of circuit C in the gearbox harness
- PossibleFaulty sensor supplying signal C
- RareFaulty input stage for circuit C in the transmission control module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.