U2975 – Lost Communication with the Steering Angle Sensor.

The ODBII code U2975 indicates that there is 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 U2975 is generally considered moderate to high.

Common Causes For: U2974 U2974: “Vehicle Communication Bus Malfunction”

• Faulty steering angle sensor
• Damaged wiring or connectors
• Poor electrical connections
• Malfunctioning power supply to the sensor
• Software issues or calibration errors
• Faulty vehicle control module (VCM)
• Interference from other electronic components

Common misdiagnosis for U2975 Lost Communication with the Steering Angle Sensor.

• Faulty Steering Angle Sensor
• Wiring Issues or Short Circuits
• Faulty Steering Column Module
• Malfunctioning Electronic Control Unit (ECU)
• Incorrectly Calibrated Steering Angle Sensor
• Issues with the Vehicle’s CAN Bus System
• Faulty Power Supply to the Sensor
• Problems with the ABS Module

Common Troubleshooting Steps

When dealing with the OBD-II code U2975, 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 Other Codes: Use an OBD-II scanner to check for any additional trouble codes. Sometimes, related codes can provide more context for the issue.
• 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: **Power Supply: Verify that the steering angle sensor is receiving the correct voltage. Use a multimeter to check the power supply at the sensor connector.
• **Ground Connection: Ensure that the ground connection for the sensor is intact and providing a good ground.
• Inspect the CAN Bus: **Communication Lines: Since the steering angle sensor communicates over the CAN bus, check for any issues with the CAN wiring. Look for shorts, opens, or interference.
• **CAN Bus Termination: Ensure that the CAN bus is properly terminated at both ends.
• Check for Software Issues: **ECU Updates: Sometimes, the issue can be resolved by updating the vehicle’s ECU software. Check with the manufacturer for any available updates.
• **Resetting Codes: After performing repairs, clear the codes and see if they return. This can help determine if the issue was temporary or if further action is needed.
• Inspect Related Components: **Steering Column: Check for any issues with the steering column or related components that may affect the sensor’s operation.
• **Other Sensors: Inspect other sensors that may interact with the steering angle sensor, such as the yaw rate sensor or ABS sensors.
• Consult Technical Service Bulletins (TSBs): Look for any TSBs related to the steering angle sensor for your specific vehicle make and model. Manufacturers may have known issues and recommended fixes.
• Professional Diagnosis: If the issue 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 problem more effectively.Conclusion By following these troubleshooting steps, you can systematically identify and resolve the issue related to the U2975 code. Always refer to the vehicle’s service manual for specific procedures and specifications related to your vehicle model.