OBD Codes

P0911

Gate Select Actuator Circuit Range/Performance

Severetransmission

Overview

The P0911 diagnostic trouble code signals a gate select actuator circuit range/performance condition detected by the transmission control module. This code relates to the automatic transmission system and may affect shift quality, timing, or overall transmission performance. Prompt attention is important to prevent further transmission damage.

Symptoms

  • Vehicle stuck in one gear (limp mode)
  • Loss of one or more gears
  • Shuddering or vibration during acceleration
  • Transmission overheating warning

Common Causes

  • Faulty transmission control module (TCM)
  • Worn or damaged internal transmission components
  • Wiring issues in the transmission harness
  • Faulty input or output speed sensor

Diagnosis Steps

  1. 1Connect an OBD-II scanner and read all stored trouble codes and freeze frame data
  2. 2Check transmission fluid level and condition; top off or replace if needed
  3. 3Test the transmission speed sensors with a multimeter or scan tool
  4. 4Inspect wiring and connectors for the transmission harness
  5. 5Perform a transmission pressure test if accessible

Estimated Repair Cost

$300$2,500

Cost varies by vehicle, location, and repair shop. Includes parts and labor.

Commonly Affected Vehicles

Ford F-150Honda AccordChevrolet SilveradoFord Explorer

Related Codes

More Transmission Codes

Frequently Asked Questions

Driving with a transmission code is risky. Continued driving can cause further damage to the transmission, resulting in significantly higher repair costs. Have it inspected as soon as possible.