U2470 – Control Module Communication Error

The ODBII code U2470: Control Module Communication Error indicates a failure in communication between control modules in the vehicle, which may affect the operation of various systems.

The severity of ODBII code **U2470: Control Module Communication Error** is generally considered moderate.

Common Causes For: U2450: Control Module Communication Error

• Faulty control module
• Poor or damaged wiring/connectors
• Corrupted software or firmware in the control module
• Low battery voltage or weak battery
• Interference from aftermarket devices
• Faulty or damaged CAN bus
• Grounding issues
• Communication network failure

Common misdiagnosis for U2470: Control Module Communication Error

• Faulty control module
• Wiring issues
• Poor ground connections
• Corrupted software or firmware
• Faulty sensors
• Battery or power supply problems
• Intermittent connection issues
• Incorrectly installed aftermarket components

Common Troubleshooting Steps

The OBD-II code **U2470: Control Module Communication Error** indicates a communication issue between control modules in a vehicle’s network. This can be caused by various factors, including wiring issues, faulty modules, or software problems. Here are some common troubleshooting steps to diagnose and resolve this issue:

• Check for Additional Codes:
• Use an OBD-II scanner to check for any other trouble codes that may be present. This can provide more context about the issue.
• Inspect Wiring and Connectors:
• Visually inspect the wiring and connectors associated with the control modules. Look for signs of damage, corrosion, or loose connections.
• Pay special attention to the CAN (Controller Area Network) bus wiring, as this is often where communication issues arise.
• Check Power and Ground:
• Ensure that the control modules have proper power and ground connections. Use a multimeter to verify voltage and ground continuity.
• Test Control Modules:
• If possible, test the affected control module(s) for functionality. This may involve using specialized diagnostic tools or swapping with a known good module.
• Check for Short Circuits:
• Inspect the wiring for any short circuits that could be causing communication issues. This may require checking continuity and resistance in the wiring harness.
• Look for Software Issues:
• Ensure that the vehicle’s software is up to date. Sometimes, a software update can resolve communication issues between modules.
• Clear Codes and Test Drive:
• After performing any repairs or checks, clear the trouble codes and take the vehicle for a test drive to see if the code reappears.
• Scan for Communication Errors:
• Use a scan tool capable of reading live data and communication status. This can help identify which module is not communicating properly.
• Check for Intermittent Issues:
• If the problem is intermittent, monitor the vehicle’s performance and communication status over time to identify any patterns or triggers.
• Consult Technical Service Bulletins (TSBs):
• Check for any TSBs related to the specific make and model of the vehicle. Manufacturers may have issued guidance on known issues and fixes. 1
• Seek Professional Help:
• If the issue persists after performing these steps, consider seeking help from a professional mechanic or dealership with experience in diagnosing communication issues. By following these steps, you can systematically identify and resolve the underlying cause of the U2470 code.