WOMS
U code network Medium severity

U2137 Lost Communication with the Steering Angle Sensor

The OBD2 code U2137 indicates that there is a loss of communication between the vehicle's control module and the steering angle sensor, which may affect systems that rely on steering input for operation

Definition

The OBD2 code U2137 indicates that there is a loss of communication between the vehicle's control module and the steering angle sensor, which may affect systems that rely on steering input for operation

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  • Software issues or outdated firmware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 Short Circuits
  • Faulty Body Control Module (BCM)
  • Faulty Electronic Power Steering (EPS) Module
  • Incorrectly Calibrated Steering Angle Sensor
  • Faulty Instrument Cluster
  • Issues with the CAN Bus Communication
  • 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. Sometimes, multiple codes can provide more context about the issue

  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 using a multimeter or scan tool to ensure it is functioning correctly

  5. 5. Resistance and Voltage

    Measure the resistance and voltage at the sensor to ensure it is within 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 (Controller Area Network) bus, check for any issues with the CAN bus wiring

  8. 8. Look for shorts, opens, or high resistance in the CAN bus lines

  9. 9. Scan Tool Data

    Use a scan tool to monitor live data from the steering angle sensor. Check if the sensor is providing data when the steering wheel is turned

  10. 10. Look for any irregularities in the data that may indicate a malfunction

  11. 11. Check for Software Updates

    Sometimes, a software update for the vehicle’s ECU (Engine Control Unit) or other modules can resolve communication issues. Check with the manufacturer for any available updates

  12. 12. Inspect Related Modules

    If the steering angle sensor is part of a larger system (like stability control or power steering), check the related modules for faults or communication issues

  13. 13. Clear Codes and Test Drive

    After performing the above checks and repairs, clear the trouble codes and take the vehicle for a test drive to see if the code reappears

  14. 14. Professional Diagnosis

    If you are unable to resolve the issue, consider seeking help from a professional mechanic or dealership, as they may have specialized tools and knowledge to diagnose complex communication issues. By following these steps, you should be able to identify the cause of the U2137 code and take appropriate action to resolve it