WOMS
U code network Medium severity

U2599 Lost Communication with the Steering Angle Sensor

The OBD2 code U2599 indicates a loss of communication with the steering angle sensor, which may affect the vehicle's stability control and steering systems

Definition

The OBD2 code U2599 indicates a loss of communication with the steering angle sensor, which may affect the vehicle's stability control and steering systems

Common causes

  • Faulty steering angle sensor
  • Damaged wiring or connectors
  • Poor electrical connections
  • Malfunctioning vehicle control module (VCM)
  • Software issues or bugs
  • Low battery voltage
  • Corrosion in connectors or terminals
  • Interference from aftermarket devices or modifications

Common misdiagnoses

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

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 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 bus, check for any issues with the CAN bus wiring or other modules on the bus

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

  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 may resolve communication issues. Check with the manufacturer for any available updates

  12. 12. Inspect Related Components

    Check other components that may affect the steering angle sensor, such as the steering column, steering rack, or any related sensors (e.g., yaw rate sensor)

  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 returns

  14. 14. Professional Diagnosis

    If the issue persists after performing these steps, consider seeking help from a professional mechanic or dealership, as they may have specialized tools and knowledge to diagnose the problem further. By following these steps, you should be able to identify the cause of the U2599 code and take appropriate action to resolve the communication issue with the steering angle sensor