U2679 – Lost Communication with the Steering Angle Sensor.

The ODBII code U2679 indicates a loss of communication with the steering angle sensor, which may affect the vehicle’s stability control and steering functions.

The severity of ODBII code U2679 is generally considered moderate.

Common Causes For: U2677 Vehicle Communication Bus Malfunction

• 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• Software issues or outdated firmware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 misdiagnosis for U2679 Lost Communication with the Steering Angle Sensor.

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

Common Troubleshooting Steps

When dealing with the OBD-II code U2679, 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 damaged.
• Test the Steering Angle Sensor: **Sensor Functionality: If possible, test the steering angle sensor to ensure it is functioning correctly. This may involve using a multimeter or an oscilloscope to check the output signal.
• **Replacement: If the sensor is faulty, consider replacing it.
• Check Power and Ground: Verify that the steering angle sensor is receiving the correct voltage and ground. Use a multimeter to check for proper voltage at the sensor connector.
• Inspect the CAN Bus: Since the steering angle sensor communicates over the CAN bus, check for any issues with the CAN network.
• Look for any damaged wiring or poor connections in the CAN bus system.
• Use a scan tool to monitor the CAN bus for any communication errors.
• Check for Software Updates: Sometimes, the issue may be related to software. Check if there are any available updates for the vehicle’s ECU that may address communication issues.
• Clear Codes and Test Drive: After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner.
• Take the vehicle for a test drive to see if the code reappears.
• 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 issued guidance on known issues.
• Professional Diagnosis: If the problem persists after performing the above steps, consider seeking help from a professional mechanic or dealership. They may have specialized tools and knowledge to diagnose the issue more effectively.Conclusion By following these troubleshooting steps, you can systematically identify and resolve the issue related to the U2679 code. Always ensure safety precautions are taken when working on vehicle electrical systems.