U1672 – Invalid Data Received from Vehicle Control Module.

The ODBII code U1672 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 U1672 is generally considered moderate.

Common Causes For: U1671 Control Module Communication Bus Off.

• 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
• Grounding issues
• Interference from aftermarket devices or modifications

Common misdiagnosis for U1672 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 control modules
• Issues with the OBDII connector or communication port
• Problems with other control modules affecting communication
• Battery or power supply issues affecting module operation

Common Troubleshooting Steps

The OBD-II code U1672 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. Here are some common troubleshooting steps to diagnose and resolve the issue:

• Check for Additional Codes: Use an OBD-II scanner to check for any other trouble codes that may be present. Sometimes, multiple codes can provide more context for the issue.
• Inspect Wiring and Connectors: Examine the wiring and connectors related to the VCM and other modules. Look for signs of damage, corrosion, or loose connections. Repair or replace any damaged components.
• Check for Ground Issues: Ensure that the ground connections for the VCM and related modules are secure and free of corrosion. Poor grounding can lead to communication issues.
• Inspect the VCM: If the wiring and connectors are in good condition, inspect the VCM itself for any signs of damage or malfunction. This may include checking for water intrusion or physical damage.
• Test Communication: Use a scan tool to test communication between the VCM and other modules. If communication is not established, there may be a fault in the VCM or the communication network.
• Check for Software Updates: Sometimes, software glitches can cause communication issues. Check if there are any available updates for the VCM or other modules and apply them if necessary.
• Battery and Charging System Check: Ensure that the vehicle’s battery and charging system are functioning properly. Low voltage can cause communication problems between modules.
• Clear Codes and Test Drive: After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code reappears.
• Consult Technical Service Bulletins (TSBs): Check for any TSBs related to the U1672 code for your specific vehicle make and model. Manufacturers may have specific recommendations or known issues that can help in troubleshooting.
• Professional Diagnosis: If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician who has experience with your vehicle’s make and model. They may have access to specialized diagnostic tools and knowledge. By following these steps, you can systematically diagnose and potentially resolve the U1672 code.