U2684 – Invalid Data Received from Vehicle Dynamics Control Module.

The ODBII code U2684 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 U2684 is typically considered moderate.

Common Causes For: U2681 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 software or firmware in the VDCM
• Malfunctioning sensors related to vehicle dynamics (e.g., wheel speed sensors)
• Communication issues within the CAN bus network
• Low battery voltage or electrical system issues
• Faulty ECU (Engine Control Unit) or other related control modules
• Grounding issues affecting the VDCM or related components

Common misdiagnosis for U2684 Invalid Data Received from Vehicle Dynamics Control Module.

• Faulty ABS module
• Incorrect wheel speed sensor readings
• Wiring issues or shorts in the harness
• Faulty vehicle dynamics control module
• Software or calibration issues
• Problems with the power supply or ground connections
• Misinterpretation of other related codes
• Faulty steering angle sensor

Common Troubleshooting Steps

When dealing with the OBD-II code U2684, which indicates “Invalid Data Received from Vehicle Dynamics Control Module,” it’s important to follow a systematic approach to troubleshoot the issue. Here are common troubleshooting steps you can take:

• 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:
• Visually inspect the wiring and connectors related to the Vehicle Dynamics Control Module (VDCM). Look for signs of damage, corrosion, or loose connections.
• Ensure that all connectors are securely attached and free of dirt or moisture.
• Check the Vehicle Dynamics Control Module:
• If the wiring and connectors appear to be in good condition, the next step is to check the VDCM itself. This may involve testing the module for proper operation or checking for any internal faults.
• If possible, compare the module’s operation with a known good module.
• Inspect Related Modules:
• The VDCM may communicate with other modules in the vehicle. Check for any issues with these related modules, as they could be causing the invalid data error.
• Ensure that all modules are functioning correctly and that there are no communication issues.
• Check for Software Updates:
• Sometimes, manufacturers release software updates for modules to fix bugs or improve performance. Check if there are any available updates for the VDCM or related modules.
• Clear Codes and Test Drive:
• After performing the above checks, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive. Monitor for the reappearance of the U2684 code or any other related codes.
• Check Power and Ground:
• Ensure that the VDCM is receiving the correct power and ground signals. Use a multimeter to check voltage and ground continuity.
• Consult Technical Service Bulletins (TSBs):
• Look for any TSBs related to the U2684 code or the VDCM for your specific vehicle make and model. Manufacturers may have specific recommendations or known issues.
• Professional Diagnosis:
• If the issue persists after performing the above steps, it may be necessary to seek the assistance of a professional mechanic or dealership. They may have specialized diagnostic tools and knowledge to further investigate the problem. By following these steps, you can systematically identify and resolve the issue related to the U2684 code.