U1372 – Invalid Data Received from Vehicle Control Module.

The ODBII code U1372 indicates that the vehicle’s control module has received invalid or corrupted data from another control module, leading to communication issues within the vehicle’s network.

The severity of ODBII code U1372 is generally considered moderate.

Common Causes For: U1371 Invalid Data Received from Vehicle Control Module.

• Faulty Vehicle Control Module (VCM)
• Poor or damaged wiring/connectors
• Corrupted software or firmware in the VCM
• Communication issues between modules
• Grounding issues
• Interference from aftermarket devices
• Low battery voltage or power supply issues

Common misdiagnosis for U1372 Invalid Data Received from Vehicle Control Module.

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

Common Troubleshooting Steps

The OBD-II code U1372 indicates that the vehicle’s control module has received invalid data from another control module. This can be caused by various issues, including communication problems, wiring issues, or faults in the control modules themselves. Here are some common troubleshooting steps to diagnose and resolve the U1372 code:

• Check for Additional Codes: Use an OBD-II scanner to check for any other trouble codes that may be present. Addressing related codes can help pinpoint the issue.
• Inspect Wiring and Connectors:
• Examine the wiring and connectors associated with the control modules involved. Look for signs of damage, corrosion, or loose connections.
• Pay special attention to the wiring harnesses that connect the modules, as these can be prone to wear and tear.
• Check for Software Updates:
• Verify if there are any software updates available for the vehicle’s control modules. Sometimes, manufacturers release updates to fix communication issues.
• Inspect Control Modules:
• If the wiring and connectors are in good condition, inspect the control modules themselves for any signs of damage or failure.
• If possible, test the modules in another vehicle to see if they function correctly.
• Perform a Hard Reset:
• Disconnect the vehicle’s battery for a few minutes to reset the control modules. Reconnect the battery and see if the code reappears.
• Check for Ground Issues:
• Ensure that all ground connections for the control modules are secure and free of corrosion. Poor grounding can lead to communication errors.
• Test Communication Lines:
• Use a multimeter or an oscilloscope to test the communication lines (CAN bus) between the control modules. Look for any irregularities in voltage or signal integrity.
• Scan for Communication Issues:
• Use a specialized scan tool to check the communication between modules. Some tools can perform a network test to identify which module is not communicating properly.
• Replace Faulty Components:
• If a specific control module is identified as faulty, consider replacing it. Ensure that the replacement module is compatible with your vehicle.
• Consult Technical Service Bulletins (TSBs):
• Check for any TSBs related to the U1372 code for your specific vehicle make and model. Manufacturers may have documented common issues and solutions. 1
• Seek Professional Help:
• If the issue persists after performing these steps, it may be best to consult a professional mechanic or technician who has experience with your vehicle’s make and model. By following these troubleshooting steps, you should be able to identify and resolve the underlying issue causing the U1372 code.