U2227 – Lost Communication with Vehicle Dynamics Control Module.

The ODBII code U2227 indicates a loss of communication between the vehicle’s control module and the Vehicle Dynamics Control Module, which may affect systems related to stability and traction control.

The severity of ODBII code U2227 is generally considered moderate to severe.

Common Causes For: U2226 Lost Communication with Vehicle Dynamics Control Module.

• Faulty Vehicle Dynamics Control Module (VDCM)
• Damaged or corroded wiring or connectors
• Poor ground connection
• Faulty communication lines (CAN bus issues)
• Software or firmware issues in the VDCM
• Malfunctioning other related modules
• Low battery voltage or power supply issues
• Intermittent electrical connections

Common misdiagnosis for U2227 Lost Communication with Vehicle Dynamics Control Module.

• Faulty Vehicle Dynamics Control Module
• Wiring issues or damaged connectors
• Faulty ABS module
• Malfunctioning Engine Control Module (ECM)
• Incorrectly diagnosed wheel speed sensors
• Power supply issues or blown fuses
• Software or calibration errors
• Faulty body control module (BCM)

Common Troubleshooting Steps

When dealing with the OBD-II code U2227, which indicates “Lost Communication with 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 Other Codes: Use an OBD-II scanner to check for any additional trouble codes. Sometimes, multiple codes can provide more context about the issue.
• Inspect the Wiring and Connectors: **Visual Inspection: Check the wiring harness 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, corroded, or damaged.
• Check Power and Ground: **Power Supply: Verify that the VDCM is receiving the correct voltage. Use a multimeter to check the power supply to the module.
• **Ground Connection: Ensure that the ground connection for the VDCM is secure and functioning properly.
• Inspect the Vehicle Dynamics Control Module: **Module Condition: Check the VDCM for any physical damage or signs of failure.
• **Reprogramming: If applicable, consider reprogramming or updating the module’s software, as a software glitch can sometimes cause communication issues.
• Check for Communication Issues: **CAN Bus Communication: Since the VDCM communicates over the CAN bus, check for issues with the CAN network. Look for other modules that may be having communication problems.
• **Scan Other Modules: Use a scan tool to check if other modules are communicating properly. If other modules are also showing communication errors, the issue may be with the CAN bus itself.
• Perform a Hard Reset: Disconnect the vehicle’s battery for a few minutes to reset the vehicle’s electronic systems. Reconnect and see if the code reappears.
• Check for Environmental Factors: Ensure that there are no environmental factors affecting the module, such as moisture or extreme temperatures.
• Consult Technical Service Bulletins (TSBs): Look for any TSBs related to the specific make and model of the vehicle. Manufacturers may have issued guidance on common issues related to the VDCM.
• 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.Conclusion Always ensure safety when working on vehicles, and if you’re unsure about any step, it’s best to consult with a professional. Proper diagnosis is key to resolving communication issues effectively.