how to fix the traction control warning on my BMW 3 Series F30/F31 (2012-2019)

Solution

1. Preparation

• Gather tools and necessary parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery before commencing work.

2. Diagnose Fault Codes

• Connect the OBD-II scanner and retrieve fault codes.
• Record any error codes related to the traction control system for reference.

3. Inspect and Clean Wheel Speed Sensors

• Locate the wheel speed sensors at each wheel hub.
• Remove any debris or dirt around the sensors using a soft brush or cloth.
• Check the sensor wiring for frays or disconnections and repair as needed.

4. Check and Refill Brake Fluid

• Locate the brake fluid reservoir and check the fluid level.
• If low, refill with the manufacturer-approved brake fluid (e.g., DOT 4).
• Inspect for any leaks in the brake lines that may cause fluid loss.

5. Inspect ABS Module and Wiring

• Visual inspection of the ABS module for any signs of damage or corrosion.
• Check the wiring harness connected to the ABS module for any wear or disconnections.
• Repair or replace any damaged wiring.

6. Test Traction Control Switch

• Locate the traction control switch on the dashboard.
• Use a multimeter to test the switch for continuity while pressing it.
• Replace the switch if it does not function correctly.