U2681 – Lost Communication with the Steering Angle Sensor.
The ODBII code U2681 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 U2681 is moderate.
Common Causes For: U2680 U2680: Control Module Communication Bus Fault
- Faulty steering angle sensor
- Damaged wiring or connectors
- Poor electrical connections
- Malfunctioning vehicle control module
- Software issues or outdated firmware
- Corrosion or dirt in connectors
- Power supply issues to the sensor
- Interference from other electronic components
Common misdiagnosis for U2681 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 OBD-II code U2681, which indicates “Lost Communication with the Steering Angle Sensor,” there are several common troubleshooting steps you can take 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 affecting the steering angle sensor.
- 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 an oscilloscope to ensure it is functioning correctly.
- **Calibration: Some vehicles require the steering angle sensor to be calibrated after installation or repair. Check the vehicle’s service manual for calibration procedures.
- Check Power and Ground: Verify that the steering angle sensor is receiving the correct voltage and ground. Use a multimeter to check for power at the sensor connector.
- Ensure that the ground connection is solid and free of corrosion.
- 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.
- Look for shorts, opens, or any other faults in the CAN bus wiring that could affect communication.
- Check for Interference: Ensure that there are no aftermarket devices or modifications that could interfere with the communication between the steering angle sensor and the vehicle’s control modules.
- 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.
- Look for any unusual readings or lack of data.
- Inspect Related Modules: Check the functionality of related control modules (e.g., ABS, ESC) that may also rely on the steering angle sensor. A fault in these modules could affect communication.
- Software Updates: Check if there are any software updates available for the vehicle’s control modules. Sometimes, manufacturers release updates to fix communication issues.
- 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.1
- Professional Diagnosis: If the issue persists after all troubleshooting steps, consider seeking help from a professional mechanic or dealership, as they may have specialized tools and knowledge to diagnose complex issues. By following these steps, you should be able to identify and resolve the issue related to the U2681 code. Always refer to the vehicle’s service manual for specific procedures and specifications.