Lost Communication With AC/AC Converter Control Module

Where it lives

For U0295, the part to look at first is the module named here.

Check these first

• A damaged harness between the ECM and the AC to AC converter control module
• A failed AC to AC converter control module
• Corrosion or water in the electrical connectors
• An ECM fault blocking communication
• Outdated module firmware

What to do next

1. Inspect the harness between the ECM and the AC to AC converter control module
2. Check the connectors for corrosion or water
3. Scan to see if the converter module or the ECM is at fault
4. Update the converter module and ECM firmware
5. Replace the failed converter module after diagnostics confirm it
6. Clear the code and retest

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