U2110 – Lost Communication with Vehicle Control Module.

The ODBII code U2110 indicates a loss of communication with the vehicle control module, suggesting that the module is not responding or is unable to communicate with other systems in the vehicle.

The severity of ODBII code U2110 is generally considered moderate to severe.

Common Causes For: U2109 U2109: “Control Module Communication Failure”

• Faulty Vehicle Control Module (VCM)
• Damaged wiring or connectors
• Poor ground connections
• Corroded terminals
• Faulty communication network (CAN bus issues)
• Malfunctioning sensors or actuators
• Software or firmware issues
• Battery or power supply problems

Common misdiagnosis for U2110 Lost Communication with Vehicle Control Module.

• Faulty Vehicle Control Module (VCM)
• Wiring issues or damaged connectors
• Faulty or corroded ground connections
• Issues with the Engine Control Module (ECM)
• Problems with the Transmission Control Module (TCM)
• Faulty sensors or actuators
• Battery or charging system problems
• Software or firmware issues in the control modules
• Communication network problems (CAN bus issues)
• Faulty diagnostic tools or incorrect scanning procedures

Common Troubleshooting Steps

The OBD-II code U2110 indicates a “Lost Communication with Vehicle Control Module.” This code typically points to a communication issue between the vehicle’s control modules, which can be caused by various factors. Here are some common troubleshooting steps to help diagnose and resolve the issue:

• Check for Other Codes: Use an OBD-II scanner to check for any additional trouble codes. Other codes may provide more context or indicate related issues.
• Inspect Wiring and Connectors:
• Visually inspect the wiring and connectors associated with the vehicle control module (VCM) and any other related modules.
• Look for damaged, frayed, or corroded wires and loose or corroded connectors.
• Ensure that all connectors are securely plugged in.
• Check Power and Ground:
• Verify that the VCM is receiving proper power and ground. Use a multimeter to check voltage at the module’s power and ground pins.
• If there is no power or ground, trace the wiring back to the fuse box or battery to identify the issue.
• Inspect the Control Module:
• If the wiring and connections are intact, the control module itself may be faulty. Check for any signs of physical damage or water intrusion.
• If possible, test the module in another vehicle or replace it with a known good module to see if the problem persists.
• Check for Communication Issues:
• Use a scan tool to monitor communication between modules. Check if other modules are communicating properly.
• If other modules are also showing communication issues, the problem may be with the vehicle’s communication network (CAN bus).
• Inspect the CAN Bus:
• Check the CAN bus wiring for shorts, opens, or interference. Look for any aftermarket devices that may be interfering with communication.
• Use an oscilloscope to check the CAN bus signals if you have access to one.
• Reset the Codes:
• After performing any repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Consult Technical Service Bulletins (TSBs):
• Check for any manufacturer-specific TSBs related to the U2110 code or communication issues. There may be known fixes or recalls for your vehicle model.
• Seek Professional Help:
• If the issue persists after performing these steps, consider seeking assistance from a qualified technician or automotive electrician who has experience with vehicle communication systems. By following these troubleshooting steps, you should be able to identify and resolve the underlying issue causing the U2110 code.