U2229 – Lost Communication with Vehicle Dynamics Control Module.

The ODBII code U2229 indicates a loss of communication with the Vehicle Dynamics Control Module, which may affect the vehicle’s stability and traction control systems.

The severity of ODBII code U2229 is generally considered moderate to high.

Common Causes For: U2228 Lost Communication with Vehicle Dynamics Control Module.

• Faulty Vehicle Dynamics Control Module (VDCM)
• Damaged or corroded wiring or connectors
• Poor ground connection
• Failed or malfunctioning communication network (CAN bus)
• Software issues or firmware corruption
• Low battery voltage or power supply issues
• Intermittent electrical connections
• Other related module failures

Common misdiagnosis for U2229 Lost Communication with Vehicle Dynamics Control Module.

• Faulty ABS Module
• Defective Wheel Speed Sensors
• Malfunctioning Engine Control Module (ECM)
• Wiring Issues or Short Circuits
• Faulty Body Control Module (BCM)
• Bad Ground Connections
• Incorrectly Diagnosed Transmission Issues
• Power Supply Problems
• Faulty Steering Angle Sensor
• Issues with the Instrument Cluster

Common Troubleshooting Steps

When dealing with the OBD-II code U2229, 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 software of the VDCM, as software issues can sometimes cause communication problems.
• Check for Communication Issues: **CAN Bus Communication: Since the VDCM communicates over the CAN bus, check for issues with the CAN bus wiring and other modules on the bus.
• **Network Integrity: Use a scan tool to monitor the CAN bus for any irregularities or communication failures with other modules.
• 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.
• Test the Module: If possible, test the VDCM in another vehicle (if you have access to one) to determine if the module itself is faulty.
• Consult Technical Service Bulletins (TSBs): Check for any TSBs related to the specific make and model of your vehicle. Manufacturers may have issued guidance on common issues related to the VDCM.
• Seek Professional Help: If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician who has experience with your vehicle’s specific systems.
• Document Findings: Keep a record of any tests performed, codes retrieved, and repairs made. This documentation can be helpful for future reference or if you need to consult a professional. By following these steps, you should be able to identify the root cause of the U2229 code and take appropriate action to resolve the communication issue with the Vehicle Dynamics Control Module.