Lost Communication With Alternative Fuel Control Module

Where it lives

For U0108, the part to look at first is the module named here.

Check these first

• Wiring or connector faults to the alternative fuel control module
• A failed alternative fuel control module
• Corroded electrical connections at the module
• An incorrect alternative fuel system installation

What to do next

1. Inspect the alternative fuel control module connectors and harness
2. Check the module power and ground
3. Verify the alternative fuel system installation
4. Confirm the module responds on the bus with a scan tool
5. Replace the alternative fuel control module if it stays offline
6. Clear the code and retest

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