U2307 – Control Module Communication Failure

The ODBII code U2307 indicates a “Control Module Communication Failure,” meaning there is a problem with the communication between the vehicle’s control modules, which may affect their ability to exchange data properly.

Moderate to Severe.

Common Causes For: U2306 Control Module Communication Bus Off.

• Faulty control module
• Damaged wiring or connectors
• Poor ground connections
• Corroded terminals
• Communication network issues (CAN bus problems)
• Software glitches or outdated firmware
• Intermittent electrical connections
• Battery voltage issues
• Faulty sensors or actuators affecting communication

Common misdiagnosis for U2307 U2307: “Control Module Communication Failure”

• Faulty control module
• Wiring issues
• Poor ground connections
• Corrupted software/firmware
• Faulty connectors or terminals
• Battery or power supply problems
• Intermittent communication issues
• Other communication protocol failures

Common Troubleshooting Steps

The OBD-II code U2307 indicates a “Control Module Communication Failure.” This code typically points to a problem with communication between various control modules in the vehicle’s network. Here are some common troubleshooting steps to 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: **Visual Inspection: Check the wiring and connectors associated with the control modules for signs of damage, corrosion, or loose connections.
• **Repair or Replace: Repair any damaged wires or connectors and ensure all connections are secure.
• Check Power and Ground: **Power Supply: Verify that the affected control module(s) are receiving the correct voltage.
• **Ground Connections: Ensure that all ground connections are clean and secure.
• Test Control Modules: **Module Functionality: If possible, test the affected control module(s) to ensure they are functioning correctly. This may involve using specialized diagnostic tools.
• **Swap Modules: If you have access to a similar vehicle, you can swap control modules to see if the problem persists.
• Inspect the CAN Bus: **CAN Bus Integrity: Check the Controller Area Network (CAN) bus for continuity and proper termination. Look for shorts, opens, or resistance issues.
• **Bus Communication: Use a scan tool to monitor the CAN bus for communication between modules. If some modules are not communicating, it may indicate a fault.
• Check for Software Updates: **Manufacturer Updates: Check if there are any software updates available for the control modules from the vehicle manufacturer. Sometimes, communication issues can be resolved with a software update.
• Clear Codes and Test Drive: After performing repairs or checks, 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): Look for any TSBs related to the specific make and model of the vehicle. Manufacturers may have issued guidance on common issues related to U2307.
• 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 issues.Conclusion Troubleshooting a U2307 code can be complex due to the nature of control module communication. Following these steps systematically can help identify and resolve the underlying issue. Always refer to the vehicle’s service manual for specific procedures and specifications.