Lost Communication With Fuel Cell Control Module

Where it lives

For U0119, the description names the module as the part involved.

Check these first

• A wiring or connector fault between the Fuel Cell Control Module and the network
• A failed Fuel Cell Control Module
• Corrosion or water in the module connectors
• Physical damage that hurt the module or its harness
• A software fault inside the module

What to do next

1. Scan all modules for communication codes
2. Inspect the Fuel Cell Control Module harness and connectors
3. Check the module power and ground feeds
4. Look for physical damage around the module and its harness
5. Replace the Fuel Cell Control Module if the bus and feeds test good
6. Clear the code and retest

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