U1367 – Control Module Communication Fault

The ODBII code U1367: Control Module Communication Fault indicates a communication issue between the vehicle’s control modules, suggesting that one or more modules are not properly exchanging data.

The severity of ODBII code **U1367: Control Module Communication Fault** is generally considered moderate to severe.

Common Causes For: U1362: Module Communication Failure

• Faulty control module
• Poor or damaged wiring/connectors
• Corrupted software or firmware in the control module
• Low battery voltage or poor battery connections
• Interference from aftermarket accessories
• Faulty or damaged OBD-II port
• Communication network issues (e.g., CAN bus problems)
• Grounding issues in the vehicle’s electrical system

Common misdiagnosis for U1367: Control Module Communication Fault

• Faulty control module
• Wiring issues or shorts
• Corroded connectors
• Power supply problems
• Software glitches or outdated firmware
• Faulty sensors
• Grounding issues
• Intermittent communication faults
• Incorrectly configured aftermarket components
• Battery or charging system problems

Common Troubleshooting Steps

The OBD-II code **U1367: Control Module Communication Fault** indicates a communication issue between the vehicle’s control modules. This can be caused by various factors, including wiring issues, faulty modules, or problems with the vehicle’s network. Here are some common troubleshooting steps to diagnose and resolve this issue:

• Check for Additional Codes:
• Use an OBD-II scanner to check for any other trouble codes that may be present. This can provide more context about the issue.
• Inspect Wiring and Connectors:
• Visually inspect the wiring and connectors associated with the control modules. Look for signs of damage, corrosion, or loose connections.
• Pay special attention to the CAN (Controller Area Network) bus wiring, as this is often where communication faults occur.
• Check Power and Ground:
• Ensure that the control modules have proper power and ground connections. Use a multimeter to verify voltage and ground continuity.
• Test Control Modules:
• If possible, test the affected control module(s) for functionality. This may involve using specialized diagnostic tools or swapping with a known good module.
• Inspect the CAN Bus:
• Use a scan tool that can monitor the CAN bus for communication. Check for any irregularities in the data being transmitted.
• Look for any short circuits or open circuits in the CAN bus wiring.
• Check for Interference:
• Ensure that there are no aftermarket devices or modifications that could be interfering with the communication between modules.
• Reset the Codes:
• After performing inspections and 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 U1367 or communication issues. There may be known fixes or recalls that apply to your vehicle.
• Professional Diagnosis:
• If the issue persists after performing the above steps, consider seeking help from a professional mechanic or dealership with experience in diagnosing communication faults. By following these steps, you should be able to identify and resolve the underlying cause of the U1367 code.