WOMS
U code network Medium severity

U2679 Lost Communication with the Steering Angle Sensor

The OBD2 code U2679 indicates a loss of communication with the steering angle sensor, which may affect the vehicle's stability control and steering functions

Definition

The OBD2 code U2679 indicates a loss of communication with the steering angle sensor, which may affect the vehicle's stability control and steering functions

Common causes

  • Faulty steering angle sensor
  • Damaged wiring or connectors
  • Poor electrical connections
  • Malfunctioning vehicle control module (VCM)
  • Software issues or outdated firmware
  • Corrosion in connectors or terminals
  • Interference from other electronic components
  • Low battery voltage or power supply issues

Common misdiagnoses

  • Faulty steering angle sensor
  • Wiring issues or damaged connectors
  • Faulty steering column module
  • ABS module failure
  • Power steering system issues
  • Incorrectly calibrated steering angle sensor
  • Faulty body control module (BCM)
  • Software or firmware issues in the vehicle's control modules

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are other issues present

  2. 2. Inspect Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors associated with the steering angle sensor for any signs of damage, corrosion, or loose connections

  3. 3. Connector Pins

    Ensure that the pins in the connectors are not bent, corroded, or damaged

  4. 4. Test the Steering Angle Sensor

    Sensor Functionality: If possible, test the steering angle sensor to ensure it is functioning correctly. This may involve using a multimeter or an oscilloscope to check the output signal

  5. 5. Replacement

    If the sensor is faulty, consider replacing it

  6. 6. Check Power and Ground

    Verify that the steering angle sensor is receiving the correct voltage and ground. Use a multimeter to check for proper voltage at the sensor connector

  7. 7. Inspect the CAN Bus

    Since the steering angle sensor communicates over the CAN bus, check for any issues with the CAN network

  8. 8. Look for any damaged wiring or poor connections in the CAN bus system

  9. 9. Use a scan tool to monitor the CAN bus for any communication errors

  10. 10. Check for Software Updates

    Sometimes, the issue may be related to software. Check if there are any available updates for the vehicle’s ECU that may address communication issues

  11. 11. Clear Codes and Test Drive

    After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner

  12. 12. Take the vehicle for a test drive to see if the code reappears

  13. 13. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the steering angle sensor or communication issues for your specific vehicle make and model. Manufacturers may have issued guidance on known issues

  14. 14. Professional Diagnosis

    If the problem persists after performing the above steps, consider seeking help from a professional mechanic or dealership. They may have specialized tools and knowledge to diagnose the issue more effectively.Conclusion By following these troubleshooting steps, you can systematically identify and resolve the issue related to the U2679 code. Always ensure safety precautions are taken when working on vehicle electrical systems