U1287 – Module Communication Failure

The ODBII code U1287 indicates a “Module Communication Failure,” meaning there is a problem with communication between the vehicle’s control modules, which may affect their ability to share data or function properly.

The severity of ODBII code U1287 is moderate.

Common Causes For: U1285 U1285: Module Communication Failure

• Faulty wiring or connectors
• Failed or malfunctioning control module
• Poor ground connections
• Corroded or damaged pins in connectors
• Intermittent electrical issues
• Software or firmware issues in the module
• Low battery voltage or power supply issues
• Communication network problems (e.g., CAN bus issues)

Common misdiagnosis for U1287 U1287: “Module Communication Failure”

• Faulty wiring or connectors
• Defective control module
• Software issues or updates needed
• Power supply problems
• Grounding issues
• Intermittent communication issues
• Other unrelated sensor failures

Common Troubleshooting Steps

The OBD-II code U1287 indicates a “Module Communication Failure,” which typically means that there is a problem with communication between the vehicle’s various 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 U1287 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.
• Check for Short Circuits: Inspect the wiring harness for any short circuits or open circuits that could be affecting communication between modules.
• Clear Codes and Test Drive: After performing any repairs or inspections, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• 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).
• Inspect the CAN Bus: If the vehicle uses a Controller Area Network (CAN) bus for communication, check the integrity of the CAN bus wiring and connections. Look for any signs of damage or interference.
• Check for Interference: Ensure that there are no aftermarket devices or modifications that could be interfering with the communication between modules.
• Consult Service Manual: Refer to the vehicle’s service manual for specific diagnostic procedures related to the U1287 code and the affected module(s). 1
• 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 should be able to identify and resolve the underlying cause of the U1287 code.