what does it mean when my BMW X3 G01 (2018-2024) traction control light comes on?

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, multimeter, torque wrench, cleaning supplies.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery for safety before working on electrical components.

2. Inspect and Clean Wheel Speed Sensors

• Locate the wheel speed sensors on each wheel hub.
• Carefully disconnect the electrical connectors from each sensor.
• Remove the sensors using the appropriate socket.
• Clean the sensor tips with an appropriate cleaning solution to remove any debris or dirt.
• Reinstall the sensors and reconnect the electrical connectors, ensuring they are secure.

3. Check the Brake Fluid Level

• Locate the brake fluid reservoir under the hood.
• Inspect the fluid level against the minimum and maximum markings on the reservoir.
• If low, top off with the manufacturer-recommended brake fluid (usually DOT 4 for BMW).
• If the fluid level is low, investigate for leaks in the brake system.

4. Test ABS System

• Reconnect the battery.
• Use an OBD-II scanner to check for any ABS fault codes.
• With the vehicle running, perform a dynamic test of the ABS system if the scanner allows it, ensuring all sensors are functioning properly.

5. Tire Inspection

• Check each tire for proper inflation according to the specifications found on the door jamb.
• Inspect tread depth using a tread depth gauge; replace tires if they are worn below the legal limit (2/32").
• Ensure all tires are matched (same size and tread pattern).