U2747 – Invalid Data Received from Vehicle Control Module.

The ODBII code U2747 indicates that the vehicle’s control module has received invalid or corrupted data from another control module, which may affect vehicle performance or functionality.

The severity of ODBII code U2747 is typically considered moderate.

Common Causes For: U2746 Invalid Data Received from the Transmission Control Module (TCM)”.

• Faulty Vehicle Control Module (VCM)
• Poor or damaged wiring/connectors
• Corrupted software or firmware in the VCM
• Communication issues between modules
• Faulty sensors sending incorrect data
• Electrical interference or grounding issues
• Low battery voltage or power supply problems

Common misdiagnosis for U2747 Invalid Data Received from Vehicle Control Module.

• Faulty Vehicle Control Module (VCM)
• Wiring issues or shorts in the communication lines
• Faulty sensors related to vehicle control
• Issues with the Engine Control Module (ECM)
• Problems with the Transmission Control Module (TCM)
• Corrupted software or firmware in the control modules
• Battery or power supply issues affecting module communication
• Incorrectly installed aftermarket accessories or modifications

Common Troubleshooting Steps

The OBD-II code U2747 indicates that there is an issue with the communication between the vehicle control module (VCM) and other modules in the vehicle. This code typically points to invalid data being received from the VCM, which can be caused by various factors. 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. Sometimes, related codes can provide more context for the issue.
• Inspect Wiring and Connectors:
• Visually inspect the wiring and connectors associated with the VCM and other modules. Look for signs of damage, corrosion, or loose connections.
• Ensure that all connectors are securely plugged in and that there are no bent pins.
• Check for Ground Issues:
• Ensure that the ground connections for the VCM and other related modules are secure and free of corrosion. Poor grounding can lead to communication issues.
• Battery Voltage:
• Check the vehicle’s battery voltage. Low voltage can cause communication problems between modules. Ensure the battery is fully charged and in good condition.
• Inspect the VCM:
• If the wiring and connections are good, the issue may lie within the VCM itself. Check for any signs of damage or malfunction.
• If possible, perform a software update or reset the VCM to see if that resolves the issue.
• Check for Interference:
• Look for any aftermarket devices or modifications that may interfere with the vehicle’s communication network. This includes things like aftermarket radios, alarms, or other electronic devices.
• Scan for Communication Issues:
• Use a professional-grade scan tool to check the communication between the VCM and other modules. This can help identify if the issue is isolated to a specific module.
• Perform a Network Test:
• Some advanced scan tools can perform a network test to check for communication errors between modules. This can help pinpoint the source of the problem.
• Consult Technical Service Bulletins (TSBs):
• Check for any TSBs related to the U2747 code for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes.
• Replace Faulty Components:
• If all else fails and the issue persists, consider replacing the VCM or any other related modules that may be causing the communication error. 1
• Professional Diagnosis:
• If you are unable to resolve the issue, it may be best to consult a professional mechanic or technician who has experience with your vehicle’s make and model. By following these steps, you should be able to identify and resolve the issue related to the U2747 code. Always remember to take necessary safety precautions when working on your vehicle’s electrical systems.