how to fix C1201 code in my Genesis G70 IG (2017-2023)

Learn how to diagnose and fix C1201 traction control issues in Genesis G70 (2017-2023). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Solution

1. Preparation

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

2. Inspect and Clean Wheel Speed Sensors

• Locate the wheel speed sensors at each wheel hub.
• Remove any dirt or debris around the sensor using a soft brush or cloth.
• Inspect connectors for corrosion and clean with an electrical contact cleaner if necessary.

3. Replace Faulty Wheel Speed Sensors (if necessary)

• If a wheel speed sensor is found to be faulty based on resistance tests:
  • Remove the old wheel speed sensor by unscrewing it from its mounting point.
  • Install the new wheel speed sensor and tighten to manufacturer’s specifications (usually around 8-10 Nm).
  • Reconnect the sensor's electrical connector.

4. Check and Repair Wiring

• Inspect wiring harnesses leading to the wheel speed sensors and ABS module.
• Repair any frayed or broken wires using electrical tape or heat-shrink connectors.
• Ensure all connectors are securely fastened, and there is no corrosion present.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the C1201 code and any other stored codes.

6. Test Drive the Vehicle

• Perform a test drive to ensure the traction control system functions correctly and the warning lights do not reappear.