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U code network High severity

U012E Lost Communication with the Steering Angle Sensor Module

The OBD2 code U012E indicates a loss of communication between the vehicle's control module and the steering angle sensor module, which may affect the vehicle's stability control and steering functions

Definition

The OBD2 code U012E indicates a loss of communication between the vehicle's control module and the steering angle sensor module, which may affect the vehicle's stability control and steering functions

Common causes

  • Faulty steering angle sensor
  • Damaged wiring or connectors
  • Poor electrical connections
  • Failed steering angle sensor module
  • Software or calibration issues
  • Malfunctioning vehicle control module (VCM)
  • Interference from aftermarket devices or modifications

Common misdiagnoses

  • Faulty Steering Angle Sensor
  • Wiring Issues or Short Circuits
  • Faulty Body Control Module (BCM)
  • Faulty Electronic Power Steering (EPS) Module
  • Incorrectly calibrated steering angle sensor
  • Faulty ABS Module
  • Software or Firmware Issues
  • Battery or Power Supply Problems

Troubleshooting steps

  1. 1. Check for Other Codes

    Use an OBD-II scanner to check for any additional trouble codes. Other codes may provide more context or indicate related issues

  2. 2. Inspect Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors leading to the steering angle sensor. Look for 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 scan tool to ensure it is functioning correctly

  5. 5. Calibration

    Some vehicles require the steering angle sensor to be calibrated after installation or repair. Check the vehicle’s service manual for calibration procedures

  6. 6. Check Power and Ground

    Power Supply: Verify that the steering angle sensor is receiving the correct voltage. Use a multimeter to check the power supply at the sensor connector

  7. 7. Ground Connection

    Ensure that the ground connection for the sensor is intact and has a good connection

  8. 8. Inspect the CAN Bus

    Communication Lines: Since the steering angle sensor communicates over the CAN bus, check for issues with the CAN wiring. Look for shorts, opens, or interference

  9. 9. CAN Bus Termination

    Ensure that the CAN bus is properly terminated at both ends

  10. 10. Check for Software Issues

    ECU Updates: Sometimes, software updates for the vehicle’s ECU can resolve communication issues. Check with the manufacturer for any available updates

  11. 11. Resetting the System

    Disconnect the battery for a few minutes to reset the vehicle’s systems, then reconnect and see if the code returns

  12. 12. Inspect Related Modules

    Other Modules: Check if other modules that communicate with the steering angle sensor are functioning properly. A fault in another module can sometimes cause communication issues

  13. 13. Perform a Scan Tool Data Check

    Use a scan tool to monitor live data from the steering angle sensor. Look for expected values when turning the steering wheel to ensure the sensor is providing data

  14. 14. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the steering angle sensor or communication issues for your specific vehicle make and model

  15. 15. Seek Professional Help

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician who has experience with your vehicle’s specific systems. By following these steps, you should be able to identify the cause of the U012E code and take appropriate action to resolve the issue