how to fix C0031 ABS wheel speed sensor fault in Volvo XC60 First Generation (2008-2017)

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, wire brush, cleaning solvent.
• Ensure the vehicle is parked on a level surface and the ignition is off.
• Disconnect the negative battery terminal to prevent any electrical shorts.

2. Remove Wheel and Brake Components

• Sub-steps:
  1. Loosen the lug nuts on the affected wheel.
  2. Raise the vehicle using a jack and secure it with jack stands.
  3. Remove the lug nuts and take off the wheel.
  4. If necessary, remove the brake caliper and rotor to gain access to the wheel speed sensor.

3. Inspect and Replace Wheel Speed Sensor

• Sub-steps:
  1. Locate the wheel speed sensor and disconnect its electrical connector.
  2. Remove the mounting bolt(s) holding the sensor in place using a socket set.
  3. Carefully pull the sensor out from its housing.
  4. Clean the mounting area using a wire brush and cleaning solvent to remove debris.
  5. Install the new wheel speed sensor, ensuring it is seated properly and secure it with the mounting bolt(s) to the specified torque (check specifications, typically around 8-10 Nm).
  6. Reconnect the electrical connector to the new sensor.

4. Reassemble Wheel and Brake Components

• Sub-steps:
  1. Reinstall the brake rotor and caliper if they were removed.
  2. Place the wheel back onto the hub and hand-tighten the lug nuts.
  3. Lower the vehicle and torque the lug nuts to the manufacturer's specifications (typically around 100-120 Nm).

5. Final Checks

• Reconnect the negative battery terminal.
• Clear the C0031 fault code using the OBD-II scanner.
• Start the engine and check for warning lights on the dashboard.