how to fix the C1234 code in my Genesis G70 IG (2017-2023)

Learn how to diagnose and fix C1234 ABS issue in Genesis G70 (2017-2023). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Clean Wheel Speed Sensors

• Tools Required: Socket set, cleaning solution, soft cloth
• Locate the wheel speed sensors on each wheel hub.
• Remove the sensor bolts using the socket set.
• Carefully pull the sensors out and inspect them for dirt or debris.
• Clean the sensor tips with a soft cloth and cleaning solution.
• Reinstall the sensors and secure them with bolts to the manufacturer's torque specifications (typically around 8-10 Nm).

3. Check Wiring and Connectors

• Tools Required: Multimeter
• Inspect the wiring harness from the wheel speed sensors to the ABS module.
• Look for frayed wires, corrosion, or loose connections.
• Use the multimeter to check for continuity in the wiring. Repair or replace any damaged sections as necessary.

4. Replace Faulty Wheel Speed Sensor

• Tools Required: Socket set, torque wrench
• If testing indicates a faulty wheel speed sensor, procure a replacement.
• Remove the defective sensor as per the previous steps.
• Install the new wheel speed sensor, ensuring it is correctly seated and secured.
• Torque the sensor bolts to the manufacturer's specifications.

5. Reconnect the Battery and Test

• Reconnect the vehicle's battery.
• Start the vehicle and check if the ABS warning light has turned off.
• Drive the vehicle at low speeds to ensure the ABS and traction control systems are functioning correctly.