U2669 – Lost Communication with the Steering Angle Sensor.

The ODBII code U2669 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 U2669 is generally considered moderate.

Common Causes For: U2668 Invalid Data Received from Vehicle Dynamics Control Module.

• 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 U2669 Lost Communication with the Steering Angle Sensor.

• Faulty steering angle sensor
• Wiring issues or damaged connectors
• Faulty steering column module
• Malfunctioning electronic stability control (ESC) system
• Issues with the vehicle’s body control module (BCM)
• Problems with the power steering system
• Faulty ABS module
• Software or calibration issues in the vehicle’s control modules

Common Troubleshooting Steps

When dealing with the OBD-II code U2669, 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 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.
• Inspect the CAN Bus System: **Communication Lines: Since the steering angle sensor communicates over the CAN bus, check the integrity of the CAN bus wiring. Look for shorts, opens, or interference.
• **Termination Resistors: Ensure that the CAN bus termination resistors are present and functioning correctly.
• Check for Ground Issues: Ensure that the steering angle sensor has a good ground connection. A poor ground can lead to communication issues.
• Scan Tool Data: Use a scan tool to monitor live data from the steering angle sensor. Check if the sensor is sending data to the vehicle’s computer.
• Look for any erratic readings or lack of data that could indicate a malfunctioning sensor.
• Inspect Related Modules: Check other modules that communicate with the steering angle sensor (e.g., ABS, ESC, or airbag modules) for faults or communication issues.
• Software Updates: Check if there are any software updates available for the vehicle’s ECU or related modules. Sometimes, communication issues can be resolved with a software update.
• Replace the Steering Angle Sensor: If all other checks are satisfactory and the sensor is still not communicating, consider replacing the steering angle sensor.
• Clear Codes and Test Drive: After performing repairs or replacements, clear the trouble codes and take the vehicle for a test drive to see if the code returns.1
• Consult Service Manual: Refer to the vehicle’s service manual for specific diagnostic procedures and specifications related to the steering angle sensor and its communication.Conclusion If you have gone through these steps and the issue persists, it may be beneficial to consult a professional mechanic or technician who has experience with your specific vehicle make and model. They may have access to specialized tools and knowledge that can help diagnose the problem more effectively.