U2661 – Invalid Data Received from Vehicle Dynamics Control Module.

The ODBII code U2661 indicates that the vehicle’s control module has received invalid or corrupted data from the Vehicle Dynamics Control Module, which may affect the vehicle’s stability and handling systems.

The severity of ODBII code U2661 is generally considered moderate.

Common Causes For: U2660 Lost Communication with the Steering Angle Sensor.

• Faulty Vehicle Dynamics Control Module (VDCM)
• Poor or damaged wiring/connectors between the VDCM and the ECU
• Corrupted or incompatible software in the VDCM
• Faulty sensors related to vehicle dynamics (e.g., wheel speed sensors)
• Communication issues within the CAN bus network
• Low battery voltage or electrical system issues
• Grounding issues affecting the VDCM or related components

Common misdiagnosis for U2661 Invalid Data Received from Vehicle Dynamics Control Module.

• Faulty ABS module
• Defective wheel speed sensors
• Incorrectly calibrated steering angle sensor
• Malfunctioning traction control system
• Wiring issues or poor connections
• Faulty vehicle dynamics control module
• Software or firmware issues in the control modules
• Battery or charging system problems

Common Troubleshooting Steps

When dealing with the OBD-II code U2661, which indicates “Invalid Data Received from Vehicle Dynamics Control Module,” 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 trouble codes that may be present. Sometimes, multiple codes can provide more context for the issue.
• Inspect Wiring and Connectors: **Visual Inspection: Check the wiring and connectors related to the Vehicle Dynamics Control Module (VDCM) for any signs of damage, corrosion, or loose connections.
• **Connector Pins: Ensure that the pins in the connectors are not bent or corroded.
• Check the Vehicle Dynamics Control Module: **Module Functionality: Verify that the VDCM is functioning correctly. This may involve checking for proper operation of the module and ensuring it is receiving power and ground.
• **Software Updates: Check if there are any software updates available for the VDCM that may address known issues.
• Inspect Related Sensors: The VDCM relies on data from various sensors (e.g., wheel speed sensors, steering angle sensors). Inspect these sensors for proper operation and ensure they are not damaged or malfunctioning.
• Test Communication Lines: **CAN Bus Communication: Since the VDCM communicates over the CAN bus, use a scan tool to check for communication issues. Look for any signs of communication failure between the VDCM and other modules.
• **Signal Integrity: Use an oscilloscope to check the signal integrity on the CAN bus lines if necessary.
• Clear Codes and Test Drive: After performing inspections 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.
• Check for Ground Issues: Ensure that the ground connections for the VDCM and related components are secure and free of corrosion.
• Consult Technical Service Bulletins (TSBs): Look for any TSBs related to the specific make and model of the vehicle that may address the U2661 code or issues with the VDCM.
• Replace the VDCM (if necessary): If all other troubleshooting steps fail and the VDCM is determined to be faulty, consider replacing the module. Ensure that the replacement module is compatible with the vehicle.
• Professional Diagnosis: If you are unable to resolve the issue, consider seeking help from a professional mechanic or dealership that has experience with your vehicle’s make and model.Conclusion Always refer to the vehicle’s service manual for specific diagnostic procedures and specifications. Following these steps should help you identify and resolve the issue related to the U2661 code.