why does my Tesla Model Y Current (2020-present) traction control light stay on

Solution

1. Preparation

• Ensure the vehicle is parked on a level surface and the ignition is off.
• Gather necessary tools and parts for the repair.
• Disconnect the 12V battery for safety.

2. Inspect and Clean Wheel Speed Sensors

• Locate the wheel speed sensors on each wheel hub.
• Carefully remove any dirt or debris surrounding the sensors.
• Use a multimeter to test the sensors for continuity:
  • Disconnect the sensor connector.
  • Check resistance across the terminals; it should be within the manufacturer's specified range.
• If a sensor is faulty, proceed to replace it.

3. Check Brake Fluid Level

• Open the hood and locate the brake fluid reservoir.
• Inspect the fluid level; it should be between the "MIN" and "MAX" marks.
• If low, refill with the manufacturer-recommended brake fluid type.
• If the fluid is contaminated, perform a brake fluid flush.

4. Update Software

• Connect the vehicle to Wi-Fi.
• On the touchscreen, navigate to Controls > Software > Check for Updates.
• Install any available updates to ensure the vehicle's software is current.

5. Reconnect Battery and Test Drive

• Reconnect the 12V battery.
• Start the vehicle and check if the traction control light is still illuminated.
• Perform a test drive to confirm that the traction control system is functioning properly.