how to fix the C0031 code on my Toyota Corolla E210 (2019-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a flat surface and set the parking brake.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect Wheel Speed Sensor

• Remove the left front wheel using a socket set.
• Locate the wheel speed sensor mounted on the wheel hub assembly.
• Disconnect the sensor electrical connector and inspect for any signs of corrosion or damage.
• Clean the connector pins using electrical contact cleaner.

3. Test Wheel Speed Sensor

• Use a multimeter to check the resistance of the sensor. The typical resistance should be between 1000 and 2000 ohms; refer to the service manual for your specific model's specifications.
• If the resistance is outside this range, replace the wheel speed sensor.

4. Replace Wheel Speed Sensor (if necessary)

• Remove the old wheel speed sensor by unscrewing it from the hub assembly.
• Install the new wheel speed sensor and tighten it to the manufacturer's specified torque (usually around 8-10 Nm).
• Reconnect the electrical connector securely.

5. Reassemble and Reconnect

• Reinstall the left front wheel and tighten the lug nuts to the manufacturer’s specified torque (usually around 100 Nm).
• Reconnect the negative battery terminal.