how to diagnose C0051 code on Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the vehicle to cool down if it has been running.

2. Inspect and Replace Wheel Speed Sensor

• Remove the wheel:

  • Use a socket set to loosen and remove the lug nuts.
  • Lift the vehicle with a jack and secure it with jack stands.

• Access the wheel speed sensor:

  • Locate the left front wheel speed sensor on the wheel hub assembly.

• Remove the old sensor:

  • Unscrew the sensor retaining bolt using a socket and ratchet.
  • Carefully pull the sensor out of the hub assembly.

• Install the new sensor:

  • Apply a small amount of dielectric grease to the sensor's O-ring to prevent moisture ingress.
  • Insert the new sensor into the hub assembly and secure it with the retaining bolt. Torque the bolt to the manufacturer’s specifications (typically around 7-10 lb-ft).

3. Reconnect Wiring and Components

• Reconnect the wiring harness:

  • Ensure the connector is clean and securely connected to the new wheel speed sensor.

• Reinstall the wheel:

  • Place the wheel back onto the hub and hand-tighten the lug nuts.
  • Lower the vehicle and fully tighten the lug nuts in a crisscross pattern to the manufacturer’s torque specification (usually around 80-100 lb-ft).

4. Final Checks

• Reconnect the battery:

  • Reconnect the negative battery terminal and ensure it is secure.

• Clear any stored codes:

  • Use the OBD-II scanner to clear the C0051 code and any other related codes.