U2641 – Lost Communication with the Steering Angle Sensor.

The ODBII code U2641 indicates a loss of communication with the steering angle sensor, which may affect the vehicle’s stability control and steering response systems.

The severity of ODBII code U2641 is generally considered moderate.

Common Causes For: U2640 Communication Bus Off.

• Faulty steering angle sensor
• Damaged wiring or connectors
• Poor electrical connections
• Malfunctioning power steering control module
• Software issues or calibration errors
• Low battery voltage or electrical system issues
• Interference from aftermarket devices or modifications

Common misdiagnosis for U2641 Lost Communication with the Steering Angle Sensor.

• Faulty Steering Angle Sensor
• Wiring Issues or Short Circuits
• Faulty Body Control Module (BCM)
• Faulty Electronic Power Steering (EPS) Module
• Incorrectly Calibrated Steering Angle Sensor
• Faulty ABS Module
• Issues with the CAN Bus Communication
• Battery or Power Supply Problems

Common Troubleshooting Steps

When dealing with OBD-II code U2641, 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. Other codes may provide more context or indicate related issues.
• 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 in the vehicle’s service manual.
• **Calibration: Some vehicles require the steering angle sensor to be calibrated after installation or repair. Check if calibration is necessary.
• Check Power and Ground: Verify that the steering angle sensor is receiving the correct voltage and that the ground connection is solid. Use a multimeter to check for power at the sensor connector.
• Inspect the CAN Bus: Since the steering angle sensor communicates over the CAN (Controller Area Network) bus, check for issues in the CAN wiring. Look for shorts, opens, or damaged wires.
• Use a scan tool to monitor the CAN bus for communication issues or other related codes.
• 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.
• Test the Vehicle’s Control Modules: If the steering angle sensor appears to be functioning correctly, the issue may lie with the vehicle’s control modules (e.g., ABS module, ESC module). Check for updates or faults in these modules.
• Clear Codes and Test Drive: After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• 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.
• Seek Professional Help: If the issue persists after following these steps, it may be necessary to consult a professional mechanic or technician who has access to advanced diagnostic tools and expertise. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the U2641 code.