U1480 – Module Communication Failure

The ODBII code U1480 indicates a communication failure between modules in a vehicle’s network, suggesting that one or more control modules are not communicating properly with each other.

The severity of ODBII code U1480 is moderate.

Common Causes For: U1471 U1471: “Control Module Communication Failure”

• Faulty wiring or connectors
• Failed or malfunctioning control module
• Poor ground connections
• Intermittent communication issues
• Software or firmware issues
• Corroded terminals
• Electrical interference
• Low battery voltage or weak battery
• Damaged or frayed harnesses
• Incompatible or aftermarket modules

Common misdiagnosis for U1480 U1480: “Module Communication Failure”

• Faulty wiring or connectors
• Defective control module
• Software issues or updates needed
• Battery or power supply problems
• Grounding issues
• Intermittent communication issues
• Other communication protocol failures

Common Troubleshooting Steps

The OBD-II code U1480 indicates a “Module Communication Failure,” which typically means that there is a problem with communication between the vehicle’s control modules. Here are some common troubleshooting steps to diagnose and resolve this issue:

• Check for Other Codes: Use an OBD-II scanner to check for any other trouble codes that may be present. Sometimes, other codes can provide additional context for the U1480 code.
• Inspect Wiring and Connectors:
• Visually inspect the wiring and connectors associated with the affected module(s). Look for signs of damage, corrosion, or loose connections.
• Pay special attention to the ground connections, as poor grounding can lead to communication issues.
• Check Power Supply: Ensure that the affected module is receiving the proper voltage. Use a multimeter to check the power supply to the module.
• Test the Module: If possible, test the affected module to ensure it is functioning correctly. This may involve using specialized diagnostic tools or swapping the module with a known good one.
• Inspect the CAN Bus:
• The U1480 code often relates to issues with the Controller Area Network (CAN) bus. Check for any shorts, opens, or faults in the CAN bus wiring.
• Use an oscilloscope or CAN bus diagnostic tool to monitor the bus for proper communication signals.
• Check for Software Updates: Sometimes, communication issues can be resolved with a software update. Check with the vehicle manufacturer for any available updates for the affected module(s).
• Clear Codes and Test Drive: After performing any repairs or inspections, clear the trouble codes and take the vehicle for a test drive to see if the U1480 code returns.
• Consult Service Manual: Refer to the vehicle’s service manual for specific diagnostic procedures related to the U1480 code and the affected module(s).
• Professional Diagnosis: If the issue persists after performing the above steps, consider seeking help from a professional mechanic or dealership with experience in diagnosing module communication issues. By following these steps, you can systematically identify and resolve the underlying cause of the U1480 code.