how to fix C0031 code in Tesla Model 3 Original (2017-2023)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and secured with wheel chocks.
• Disconnect the negative terminal of the 12V battery to prevent electrical shorts.

2. Inspect and Clean

• Tools Required: Wire brush, electrical cleaner, multimeter.
• Inspect the wheel speed sensor connector and wiring.
  • Clean any corrosion from the connector using electrical cleaner.
  • Use a wire brush to remove rust or debris from the sensor mounting surface.

3. Replace Wheel Speed Sensor

• Tools Required: Socket set, torque wrench, safety gloves, safety glasses.
• Remove the wheel on the affected side.
  • Loosen lug nuts with a socket wrench and remove the wheel.
• Remove the old wheel speed sensor.
  • Locate the sensor, disconnect the wiring connector, and remove the retaining bolt.
  • Carefully pull the sensor from its mount.
• Install the new wheel speed sensor.
  • Insert the new sensor into place, secure it with the retaining bolt, and reconnect the wiring.
  • Torque the bolt to the manufacturer's specifications (typically around 10-15 ft-lbs).
• Reinstall the wheel and tighten the lug nuts in a crisscross pattern.

4. Reconnect Battery and Reset Codes

• Reconnect the negative terminal of the 12V battery.
• Use an OBD-II scanner to clear the C0031 code from the system.
• Conduct a brief test drive to ensure the warning light does not reappear.