OBD Codes

C0105

Stability Control Motor Circuit Malfunction

Severeelectrical

Overview

The C0105 code indicates that the chassis control module has detected a stability control motor circuit malfunction condition. This diagnostic trouble code relates to the electrical control circuits within the vehicle's chassis safety systems, including ABS, traction control, and stability control. When this code is stored, one or more chassis safety features may be disabled, which can reduce braking performance and vehicle stability under adverse driving conditions.

Symptoms

  • Brake warning light illuminated
  • Steering feels heavy or unresponsive
  • Stability control (ESC/VSC) warning light on
  • Suspension ride quality noticeably degraded

Common Causes

  • Loose or corroded connector pins
  • Failed power steering control module
  • Water intrusion into electrical connectors
  • Faulty ABS control module (EBCM)

Diagnosis Steps

  1. 1Connect an OBD-II scanner and read all stored chassis trouble codes and freeze frame data
  2. 2Inspect the ABS/ESC module connectors for corrosion, damage, or loose pins
  3. 3Check the ABS fuse and relay in the fuse box; replace if blown or faulty
  4. 4Test the ABS pump motor operation using a scan tool bi-directional command
  5. 5Measure circuit voltage and ground at the ABS module with a multimeter

Estimated Repair Cost

$150$1,200

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

Commonly Affected Vehicles

Toyota TundraGMC SierraChevrolet SilveradoFord Explorer

Related Codes

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Frequently Asked Questions

Your standard brakes will still work, but the anti-lock braking function is disabled. This means wheels can lock up during hard braking, especially on wet or icy roads. Avoid aggressive driving and have the system inspected promptly.