P0905 code meaning
Gate Select Position Circuit A Range/Performance
Powertrain system Generic code P09xx codes Check engine light
What P0905 means
Plausibility fault of the gate select position signal on circuit A in an automated manual gearbox. The signal is electrically within limits, but it does not fit what the control module expects: typical checks compare the measured select travel with the learned gate positions and the commanded target gate. No manufacturer documents this code in freely citable material. Patents by Aisin AI on select control with target and actual gate, and on fallback strategies after a stroke sensor failure, show how the module depends on this signal; CARB requires rationality checks on such inputs. P0904, P0906 and P0907 cover the electrical faults, P0909 a select movement that misses its target. The driver typically sees a fallback mode with no or limited shifting.
P0905 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0905
- Check engine or transmission warning light on
- Gearbox drops to neutral or refuses certain gears
- Slow or jerky gear changes in fallback mode
Common causes of P0905
- Most likelyWorn or drifting gate select sensor, main and redundant tracks disagree
- PossibleHigh resistance at connector pins distorting the sensor voltage
- PossibleGate positions not relearned after actuator, clutch or TCM replacement
- Less likelyLoose or displaced magnet or sensor mounting on the select shaft
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Gate select position sensor aWiring harnessTCM
What each part of P0905 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 9 | Area: transmission. |
| 05 | The exact fault in that area. |
What to do next
- Note P0905 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0905
What does P0905 mean?
P0905 means "Gate Select Position Circuit A Range/Performance". Plausibility fault of the gate select position signal on circuit A in an automated manual gearbox. It is a generic code, so it means the same on every make.
Is it safe to drive with P0905?
Drive gently and only to a workshop. With P0905 the car can go into limp mode (reduced power) to protect itself.
Will P0905 fail an emissions test?
Yes, it can. P0905 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0905 to fix?
Difficulty: hard. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P0905 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.