U2498 – Module Communication Failure

The ODBII code U2498 indicates a communication failure between modules in the vehicle’s network, suggesting that one or more electronic control units (ECUs) are not communicating properly.

The severity of ODBII code U2498 is generally considered moderate.

Common Causes For: U2497 Lost Communication with Battery Energy Control Module (BECM) – Battery Energy Control Module (BECM) Performance.

• Faulty wiring or connectors
• Failed control module
• Poor ground connections
• Corroded terminals
• Communication network issues (CAN bus problems)
• Software glitches or outdated firmware
• Intermittent electrical issues
• Low battery voltage or power supply problems

Common misdiagnosis for U2498 U2498: “Module Communication Failure”

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

Common Troubleshooting Steps

The OBD-II code U2498 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 additional trouble codes. Sometimes, other codes can provide context or lead to the root cause of the communication failure.
• 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 ground connections, as poor grounding can lead to communication issues.
• Check Power Supply: Ensure that the affected module is receiving the proper voltage and ground. Use a multimeter to check the power and ground circuits.
• Test the Module: If possible, test the affected module to ensure it is functioning correctly. This may involve bench testing or swapping with a known good module.
• Check for Intermittent Issues: Sometimes, communication failures can be intermittent. Wiggle the wiring harnesses and connectors while monitoring for changes in the code or module response.
• Inspect the CAN Bus: If the vehicle uses a Controller Area Network (CAN) bus for communication, check the integrity of the bus. Look for short circuits, open circuits, or other issues that could disrupt communication.
• Update Software/Firmware: Check if there are any software or firmware updates available for the vehicle’s modules. Sometimes, communication issues can be resolved with an update.
• Perform a Hard Reset: Disconnect the vehicle’s battery for a few minutes to reset the modules. Reconnect and see if the code reappears.
• Scan Tool Communication: Ensure that your OBD-II scanner is functioning properly and can communicate with all modules. Sometimes, the scanner itself may have issues.
• Consult Service Manual: Refer to the vehicle’s service manual for specific diagnostic procedures related to the U2498 code and the affected module(s). 1
• Professional Diagnosis: If the issue persists after performing these 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 U2498 code.