U2656 – Invalid Data Received from Vehicle Dynamics Control Module.

The ODBII code U2656 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 U2656 is generally considered moderate.

Common Causes For: U2655 Invalid Data Received from Vehicle Dynamics Control Module.

• Faulty Vehicle Dynamics Control Module (VDCM)
• Poor or damaged wiring/connectors between the VDCM and the ECU
• Corrupted or incompatible software 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

Common misdiagnosis for U2656 Invalid Data Received from Vehicle Dynamics Control Module.

• ABS Module Failure
• Wheel Speed Sensor Issues
• Traction Control System Malfunction
• Steering Angle Sensor Fault
• Body Control Module Problems
• Wiring or Connector Issues
• Powertrain Control Module (PCM) Errors
• Faulty Brake System Components

Common Troubleshooting Steps

When dealing with the OBD-II code U2656, which indicates “Invalid Data Received from Vehicle Dynamics Control Module,” it’s important to follow a systematic approach to troubleshoot the issue. Here are some common troubleshooting steps:

• 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 that could affect communication.
• Check the Vehicle Dynamics Control Module:
• Ensure that the VDCM is functioning properly. If possible, test the module with a known good unit or perform a diagnostic check if the manufacturer provides specific procedures.
• Inspect the CAN Bus:
• The VDCM communicates over the Controller Area Network (CAN) bus. Check for issues with the CAN bus wiring, such as shorts, opens, or interference. Use an oscilloscope to monitor the CAN signals if necessary.
• Check Power and Ground:
• Verify that the VDCM is receiving the correct power and ground. Use a multimeter to check voltage levels at the module’s power and ground pins.
• Look for Software Updates:
• Check if there are any software updates available for the vehicle’s control modules. Sometimes, manufacturers release updates to fix communication issues.
• Clear Codes and Test Drive:
• After performing any repairs or checks, clear the trouble codes and take the vehicle for a test drive to see if the code returns.
• Consult Technical Service Bulletins (TSBs):
• Look for any TSBs related to the U2656 code or the VDCM for your specific vehicle make and model. Manufacturers may have documented common issues and 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 diagnostic tools and experience with the specific vehicle.
• Replace the Module (if necessary):
• If all other troubleshooting steps fail and the VDCM is determined to be faulty, replacement of the module may be necessary. By following these steps, you can systematically identify and resolve the issue related to the U2656 code. Always refer to the vehicle’s service manual for specific procedures and specifications.