U1297 – Module Communication Failure

The ODBII code U1297 indicates a “Module Communication Failure,” meaning that there is a problem with communication between the vehicle’s control modules, often due to a fault in the wiring, connectors, or the modules themselves.

The severity of ODBII code U1297 is moderate.

Common Causes For: U1296 U1296: “Control Module Communication Failure”

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

Common misdiagnosis for U1297 U1297: “Module Communication Failure”

• Faulty wiring or connectors
• Defective control module
• Low battery voltage
• Corroded terminals
• Intermittent communication issues
• Software glitches or updates needed
• Grounding issues
• Faulty sensors or actuators

Common Troubleshooting Steps

The OBD-II code U1297 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 U1297 code.
• Inspect Wiring and Connectors:
• Visually inspect the wiring and connectors associated with the affected modules. 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 modules are receiving the proper voltage. Use a multimeter to check the power supply to the modules.
• Test Communication Lines:
• Use a scan tool to check the communication lines (CAN bus, LIN bus, etc.) for continuity and proper voltage levels.
• If you have access to an oscilloscope, you can check the signal waveforms on the communication lines to ensure they are functioning correctly.
• Inspect Modules:
• If possible, check the affected module for any signs of physical damage or water intrusion.
• If you suspect a specific module is faulty, you may need to replace it or test it in another vehicle to confirm its functionality.
• Reset the Codes: 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 modules.
• Consult Wiring Diagrams: Refer to the vehicle’s wiring diagrams to understand the communication network and identify any potential issues in the circuit.
• Professional Diagnosis: If the issue persists after performing the above steps, it may be necessary to consult a professional technician who has experience with the specific vehicle make and model. They may have access to specialized diagnostic tools and resources. By following these steps, you should be able to identify and resolve the underlying issue causing the U1297 code.