U2690 – Lost Communication with the Steering Angle Sensor.

The ODBII code U2690 indicates a loss of communication between the vehicle’s control module and the steering angle sensor, which may affect the vehicle’s stability control and steering functions.

The severity of ODBII code U2690 is generally considered moderate.

Common Causes For: U2689 Invalid Data Received from Vehicle Control Module.

• Faulty steering angle sensor
• Damaged wiring or connectors
• Poor electrical connections
• Malfunctioning vehicle control module (VCM)
• Software issues or outdated firmware
• Corrosion or dirt in connectors
• Faulty CAN bus communication
• Power supply issues to the sensor

Common misdiagnosis for U2690 Lost Communication with the Steering Angle Sensor.

• Faulty steering angle sensor
• Wiring issues or damaged connectors
• Faulty steering column module
• Malfunctioning ABS module
• Incorrectly calibrated steering angle sensor
• Power supply issues
• Faulty electronic control unit (ECU)

Common Troubleshooting Steps

When dealing with the OBD-II code U2690, which indicates “Lost Communication with the Steering Angle Sensor,” there are several common troubleshooting steps you can follow to diagnose and potentially resolve the issue. Here’s a structured approach:

• 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.
• 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.
• **Connector Pins: Ensure that the pins in the connectors are not bent, corroded, or pushed back.
• 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. Check for proper voltage and resistance values as specified by the manufacturer.
• **Calibration: Some vehicles require the steering angle sensor to be calibrated after installation or repair. Check if calibration is necessary.
• Check Power and Ground: Verify that the steering angle sensor is receiving the correct voltage and has a good ground connection. Use a multimeter to measure voltage at the sensor connector.
• Inspect the CAN Bus: Since the steering angle sensor communicates over the CAN (Controller Area Network) bus, check for issues in the CAN wiring. Look for shorts, opens, or interference in the CAN lines.
• Use a scan tool to monitor the CAN bus for any communication issues.
• Check for Software Updates: Sometimes, manufacturers release software updates that can resolve communication issues. Check if there are any updates available for the vehicle’s ECU.
• Clear Codes and Test Drive: After performing any repairs or adjustments, clear the trouble codes and take the vehicle for a test drive to see if the code returns.
• 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 documented common issues and fixes.
• Replace the Steering Angle Sensor: If all other steps fail and the sensor is confirmed to be faulty, consider replacing the steering angle sensor.
• Seek Professional Help: If you are unable to resolve the issue after these steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle. By following these steps, you should be able to diagnose and potentially fix the issue related to the U2690 code. Always refer to the vehicle’s service manual for specific procedures and specifications.