why does my BMW X5 F15 (2014-2019) traction control light keep coming on?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect Wheel Speed Sensors

• Locate the wheel speed sensors at each wheel hub.
• Use a socket set to remove any mounting bolts if necessary.
• Clean the sensor and connector to remove dirt or debris.
• Test the sensor's resistance using a multimeter; it should fall within the manufacturer's specified range.

3. Check Wiring and Connectors

• Visually inspect all wiring and connectors leading to the ABS module.
• Look for signs of wear, fraying, or corrosion.
• Repair or replace any damaged wires or connectors as needed.

4. Brake System Inspection

• Check the brake fluid reservoir; refill with the specified DOT fluid if low.
• Inspect the brake lines and hoses for leaks.
• If leaks are found, replace affected parts and bleed the brake system.

5. ABS Module Test

• Reconnect the battery terminal.
• Using an OBD-II scanner, clear any existing codes.
• Perform a test drive to monitor the traction control system's operation.
• Re-scan for error codes after the test drive to confirm the absence of new codes.