Lost Communication With Fuel Additive Control Module

Where it lives

For U0118, the description names the module as the part involved.

Check these first

• A damaged harness or connector between the network and the Fuel Additive Control Module
• A failed Fuel Additive Control Module
• A power or ground loss at the module
• A software fault in the module or network

What to do next

1. Scan all modules for communication codes
2. Inspect the harness and connectors at the Fuel Additive Control Module
3. Check the module power and ground feeds
4. Reflash the module software if the bus and feeds test good
5. Replace the Fuel Additive Control Module if the fault returns
6. Clear the code and retest

Look up another code