how to fix C1234 code on my Honda Accord 10th Generation (2018-2022)

Learn how to diagnose and fix C1234 ABS issue in Honda Accord 10th Generation. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a flat surface and secure it with wheel chocks.
• Disconnect the negative terminal of the battery to prevent any electrical shorts.

2. Inspect and Clean Wheel Speed Sensors

• Locate the wheel speed sensors on each wheel hub.
• Remove the sensor mounting bolts using a socket set.
• Carefully pull the sensor out and inspect the tip for dirt or debris.
• Clean the sensor tip with a soft cloth and brake cleaner.
• Reinstall the sensor and torque the mounting bolts to the manufacturer’s specifications (usually around 7-10 ft-lb).

3. Check and Repair Wiring

• Visually inspect the wiring harness connected to the wheel speed sensors for any signs of fraying or damage.
• Use a multimeter to test continuity in the wires; repair or replace any damaged sections.
• Ensure all connectors are secure and free of corrosion.

4. Test and Replace Wheel Speed Sensor (if necessary)

• If the sensor fails the resistance test, replace it with a new sensor.
• To replace, disconnect the electrical connector to the sensor.
• Remove the old sensor and install the new one.
• Reconnect the wiring harness and ensure it is secure.

5. Reconnect Battery and Clear Codes

• Reconnect the negative terminal of the battery.
• Use the OBD-II scanner to clear the C1234 code from the system.
• Start the vehicle and check if the ABS and traction control lights are off.