Concerns the drive circuit of the gate select actuator, the motor or valve that moves the shift mechanism of an automated manual gearbox sideways from gate to gate. The code sets when the control module finds this output open or electrically faulty, for example when no current flows although the driver stage is switched on. No manufacturer documents this code publicly. Isuzu and Hyundai/Kia patents describe select and shift actuators as electric motors fed by the transmission controller; older and heavy-duty systems use hydraulic or pneumatic select cylinders with solenoid valves. CARB requires circuit checks on such outputs. P0911 to P0913 are the range, low and high variants, P0909 a select movement that misses its target. Without the select actuator the gearbox cannot change gates and stays in its current gear or neutral.
Medium severity. Can I keep driving?If the car is running normally, drive in moderation to a repair shop. If it loses power or another warning appears, do not continue.
Symptoms
- Check engine or transmission warning light on
- Gearbox cannot change between gates, only some gears available
- Vehicle may stay in neutral and not drive off
Most likely causes
- Open winding or worn brushes in the select motor
- Broken actuator wire or terminal pushed out of the connector
- Corroded actuator connector near the gearbox
- Faulty actuator driver stage in the transmission control module
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: hard
- It can trigger limp mode.
- It affects emissions.
What each character of P0910 means
- P: Powertrain: engine and transmission
- 0: Generic code: same on every make
- 9: Transmission
- 10: Specific fault in that system
Frequently asked questions
Can I keep driving with code P0910?
If the car is running normally, drive in moderation to a repair shop. If it loses power or another warning appears, do not continue.
What causes code P0910?
The most common causes are: open winding or worn brushes in the select motor; broken actuator wire or terminal pushed out of the connector; corroded actuator connector near the gearbox.
Related codes
- P0909Gate Select Control Error
- P0911Gate Select Actuator Circuit Range/Performance
- P0912Gate Select Actuator Circuit Low
- P0913Gate Select Actuator Circuit High
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.