what does the C0031 code mean for my Volkswagen Golf MK7 (2015-2019)?

Solution

1. Preparation

• Gather tools and parts needed for repair.
• Ensure the vehicle is parked on a flat surface and securely raise it using jack stands.
• Disconnect the negative battery terminal to prevent electrical shocks.

2. Inspect and Replace Wheel Speed Sensor

• Tools Required: Multimeter, socket set, torque wrench, wire brush, electrical cleaner.
• Carefully remove the left front wheel to access the wheel speed sensor.
• Disconnect the electrical connector from the wheel speed sensor.
• Use a socket to remove the mounting bolts for the wheel speed sensor.
• If the sensor appears damaged or if the resistance readings were out of specification, replace it with a new component.
• Clean the mounting area to ensure a proper seal for the new sensor.
• Install the new wheel speed sensor and torque it to the manufacturer’s specifications (typically around 7-10 Nm).
• Reconnect the electrical connector securely.

3. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Clear any existing fault codes using an OBD-II scanner.
• Perform a test drive to ensure the ABS and traction control lights do not reappear and that the braking system functions correctly.