how to diagnose a C0031 code in Tesla Model 3 Original (2017-2023)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure safety by disconnecting the high-voltage battery before starting work on the vehicle.

2. Remove and Replace Wheel Speed Sensor

1. Lift the Vehicle: Use a hydraulic jack to raise the front of the vehicle and secure it with jack stands.
2. Remove Wheel: Take off the left front wheel to access the wheel speed sensor.
3. Disconnect Sensor Connector: Carefully disconnect the electrical connector from the wheel speed sensor.
4. Remove Sensor: Unscrew the wheel speed sensor from its mounting location using the appropriate socket.
5. Install New Sensor: Place the new wheel speed sensor in the mounting location and tighten to the manufacturer's torque specifications (typically around 10-15 Nm).
6. Reconnect Connector: Reattach the electrical connector, ensuring a secure fit.

3. Reassemble and Test

1. Reinstall Wheel: Place the left front wheel back on and tighten the lug nuts to the specified torque (generally around 100 Nm).
2. Lower Vehicle: Carefully lower the vehicle back to the ground.
3. Reconnect High-Voltage Battery: If disconnected, reconnect the high-voltage battery.
4. Clear Codes: Use the OBD-II scanner to clear any codes before starting the vehicle.
5. Test Drive: Conduct a test drive to verify that the C0031 code does not return and that the ABS and traction control systems are functioning correctly.