how to fix C0031 code in Ford Explorer Sixth Generation (2020-present)

Solution

1. Preparation

• Gather tools and required parts.
• Disconnect the vehicle battery to ensure safety while working on electrical components.

2. Inspect and Replace Wheel Speed Sensor

• Tools Required: Socket set, multimeter, torque wrench, wire brush, dielectric grease.
• Remove the left front wheel using a jack and jack stands.
• Locate the wheel speed sensor on the left front hub assembly.
• Disconnect the electrical connector from the sensor.
• Remove the mounting bolt(s) securing the sensor.
• Carefully pull the sensor from its mounting location.
• Check Sensor: Test the old sensor’s resistance with a multimeter (should be 1,000 to 2,000 ohms). If it is outside this range, replace it.
• Install New Sensor:
  • Insert the new sensor into its mounting location.
  • Secure it with the mounting bolt(s) and tighten to manufacturer specifications (typically around 10-15 ft-lbs).
  • Reconnect the electrical connector.
• Apply dielectric grease to the connector to prevent corrosion.

3. Inspect and Repair Wiring

• Check the wiring harness for the left front wheel speed sensor for any signs of wear, fraying, or breaks.
• If damage is found, repair the wiring with solder and heat shrink tubing or replace the entire wiring harness if necessary.

4. Reconnect Battery and Test

• Reconnect the vehicle battery.
• Clear the C0031 code using the OBD-II scanner.
• Start the vehicle and conduct a test drive to ensure that the ABS and traction control systems function normally and the warning lights remain off.