P0910 critical

Gate Select Actuator Circuit Open

The P0910 code means the vehicle's onboard diagnostic system has detected: Gate Select Actuator Circuit Open. This is a critical severity code.

My Garage →
Keep driving?
No -- stop driving
DIY difficulty
hard
Estimated cost
$300 - $1,500 (parts and labor)
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Common Symptoms

  • Check Engine Light illuminated
  • Automated transmission cannot select gear gates
  • Vehicle stuck in one gear or neutral
  • No response when shifting

Probable Causes (Ranked by Likelihood)

  • Failed gate select actuator motor Very High
  • Open circuit in gate select actuator wiring High
  • Disconnected connector at gate select actuator Moderate
  • TCM output driver circuit failure Low

Step-by-Step Diagnostic Procedure

  1. Check the gate select actuator connector is properly connected

  2. Measure actuator motor resistance with a multimeter

  3. Test for continuity in the wiring between TCM and actuator

  4. Command the actuator using a bidirectional scan tool

Frequently Asked Questions

What is a gate select actuator?

In automated manual transmissions, the gate select actuator moves the shift mechanism left and right to select the appropriate gear gate (like moving a manual shifter side to side). A separate actuator then moves within the gate to engage the gear.

Can I drive with P0910?

No, without the gate select actuator, the transmission cannot change gears. The vehicle must be towed.

Are gate select actuators expensive?

The actuator itself is typically $200 to $600. Labor can be significant as the actuator is often inside the transmission housing.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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