U2981 – Lost Communication with the Steering Angle Sensor.

The ODBII code U2981 indicates a loss of communication with the steering angle sensor, which may affect the vehicle’s stability control and steering systems.

The severity of ODBII code U2981 is generally considered moderate.

Common Causes For: U2980 Lost Communication with the Steering Angle Sensor.

• Faulty steering angle sensor
• Damaged wiring or connectors
• Poor electrical connections
• Malfunctioning vehicle control module
• Software issues or bugs
• Corrosion in connectors or terminals
• Interference from other electronic components
• Low battery voltage or power supply issues

Common misdiagnosis for U2981 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 U2981, 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 an oscilloscope to ensure it is functioning correctly.
• **Resistance and Voltage: Check the resistance and voltage output of the sensor according to the manufacturer’s specifications.
• 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 check for power 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 CAN bus scanner to check for communication errors.
• Clear Codes and Test Drive: After performing inspections and repairs, clear the trouble codes using the OBD-II scanner.
• Take the vehicle for a test drive to see if the code reappears.
• 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.
• 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. These can provide valuable insights and solutions.
• 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.
• Professional Diagnosis: If you are unable to resolve the issue, it may be best to consult a professional mechanic or technician who has experience with your vehicle’s make and model. By following these steps, you should be able to identify the cause of the U2981 code and take appropriate action to resolve the communication issue with the steering angle sensor.