WOMS
U code network Medium severity

U2831 Lost Communication with the Steering Angle Sensor

The OBD2 code U2831 indicates that there is a communication failure between the vehicle's control module and the steering angle sensor, which may affect the vehicle's stability control and steering functions

Definition

The OBD2 code U2831 indicates that there is a communication failure between the vehicle's control module and 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  • Software issues or outdated firmware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 pushed back

  4. 4. Test the Steering Angle Sensor

    Sensor Functionality: If possible, test the steering angle sensor using a multimeter or an oscilloscope to ensure it is functioning correctly

  5. 5. Resistance and Voltage

    Check the resistance and voltage output of the sensor according to the manufacturer’s specifications

  6. 6. Check Power and Ground

    Verify that the steering angle sensor is receiving the correct power supply and ground. Use a multimeter to check for 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. Termination Resistors

    Ensure that the CAN bus termination resistors are present and functioning correctly

  9. 9. Signal Integrity

    Use an oscilloscope to check the CAN signals for proper voltage levels and signal integrity

  10. 10. Look for Interference

    Check for any potential sources of electrical interference that could affect communication between the steering angle sensor and the vehicle’s control modules

  11. 11. Reset the Codes

    After performing inspections and repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns

  12. 12. Check for Software Updates

    Sometimes, a software update for the vehicle’s control modules can resolve communication issues. Check with the manufacturer for any available updates

  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

  14. 14. Replace the Steering Angle Sensor

    If all other steps fail and the sensor is confirmed to be faulty, consider replacing the steering angle sensor.1

  15. 15. Professional Diagnosis

    If you are unable to resolve the issue, it may be best to consult a professional mechanic or technician who has experience with your vehicle’s systems. By following these steps, you should be able to identify the cause of the U2831 code and take appropriate action to resolve the communication issue with the steering angle sensor