Lost Communication With Fuel Injector Control Module

Where it lives

For U0105, the part to look at first is the injector named here.

Check these first

• A short or open in the fuel injector control module harness
• A failed fuel injector control module
• A power supply fault at the module
• An ECM fault on the communication bus

What to do next

1. Check the fuel injector control module power and ground
2. Inspect the module harness for opens and shorts
3. Check battery and alternator output for the supply fault
4. Confirm the ECM communicates with the module on a scan tool
5. Replace the fuel injector control module if it stays offline
6. Clear the code and retest

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