P0910 Gate Select Actuator Circuit/Open

P0910 indicates a gate select actuator circuit or open-circuit fault. The controller cannot complete the electrical path for the gate select actuator.

Code details

Generic OBD-II · P0

System: Transmission
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not run repeated actuator commands if the circuit is open; verify wiring and load first.

Symptoms of P0910

Harsh, delayed, or slipping shifts, or being stuck in one gear.
Check-engine light, sometimes with limp-home mode.
Flaring RPM or a shudder under load.

Common causes of P0910

Low or degraded transmission fluid.
A failing speed sensor, shift solenoid, or pressure-control circuit.
Wiring, connector, or internal hydraulic/mechanical faults.

Useful checks before replacing parts

Check actuator feed voltage, ground, driver command, resistance, current draw, connector condition, and continuity through the harness.
Inspect actuator wiring, module connector pins, transmission connector sealing, relay or fuse supply, and signs of fluid or water intrusion.
Compare gate command with position feedback to confirm whether the actuator is electrically open or mechanically unresponsive.

Related OBD-II codes

These nearby transmission entries can help compare wording and pin down the fault area.