how to fix C1231 code on Honda Accord 9th Generation (2013-2017)

Learn how to diagnose and fix C1231 code related to the VSA system in Honda Accord 2013-2017. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather the necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the negative battery terminal to ensure safety while working on the electrical system.

2. Inspect Wheel Speed Sensors

• Locate the wheel speed sensors at each wheel hub.
• Remove any necessary wheel covers or components to access the sensors.
• Unplug the sensors and visually inspect for damage.
• Clean the sensor mounting area to remove any debris or dirt.

3. Check Wiring and Connectors

• Trace the wiring from the wheel speed sensors to the VSA control module.
• Check for any signs of wear, fraying, or corrosion at the connectors.
• Use a multimeter to test the continuity of the wiring; repair any damaged wires as necessary.

4. Replace Faulty Wheel Speed Sensor (if needed)

• If one or more sensors are faulty based on the resistance test, replace them.
• Remove the old sensor by unscrewing it from the hub.
• Install the new sensor by reversing the removal process, ensuring it is securely fastened.

5. Reconnect and Test

• Reconnect all connectors and wiring.
• Reconnect the negative battery terminal.
• Clear any existing codes with the OBD-II scanner.
• Start the vehicle and perform a test drive to verify the repair.