U022E Lost Communication with the Steering Angle Sensor

Definition

Common causes

• Faulty steering angle sensor
• Damaged wiring or connectors
• Poor electrical connections
• Failed steering column control module
• Software issues or glitches
• Low battery voltage
• Corroded terminals
• Interference from aftermarket devices

Common misdiagnoses

• Faulty steering angle sensor
• Wiring issues or damaged connectors
• Faulty steering column control module
• Issues with the vehicle's ABS module
• Problems with the power steering system
• 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. 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 or corroded

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. Signal Output

   Check if the sensor is sending the correct signal to the vehicle’s computer

6. 6. Check Power and Ground

   Power Supply: Verify that the steering angle sensor is receiving the correct voltage as specified in the vehicle’s service manual

7. 7. Ground Connection

   Ensure that the ground connection for the sensor is intact and functioning

8. 8. Inspect the CAN Bus

   Communication Lines: Since the steering angle sensor communicates over the CAN bus, check for any issues with the CAN wiring or other modules on the bus

9. 9. Bus Termination

   Ensure that the CAN bus is properly terminated and that there are no short circuits or open circuits

10. 10. Look for Software Issues

    Module Updates: Check if there are any software updates available for the vehicle’s control modules that might address communication issues

11. 11. Resetting Modules

    Sometimes, resetting the vehicle’s modules can resolve communication issues. This can be done by disconnecting the battery for a short period

12. 12. Perform a System Scan

    Use a professional-grade scan tool to perform a complete system scan. This can help identify if other modules are having communication issues that could affect the steering angle sensor

13. 13. Check for Physical Obstructions

    Ensure that there are no physical obstructions or mechanical issues affecting the steering system that could impact the sensor’s operation

14. 14. 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 known fixes for common problems

15. 15. Replace the Steering Angle Sensor

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

16. 16. Clear Codes and Test Drive

    After performing repairs or replacements, clear the codes and take the vehicle for a test drive to see if the code returns.Conclusion If you are not comfortable performing these steps or if the issue persists after troubleshooting, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle make and model. They will have the tools and expertise to diagnose and repair the issue effectively