U0105
NetworkModule Communicationhigh severityLost Communication with Fuel Injector Control Module
What U0105 Means
Cannot communicate with the fuel injector driver module, separate from the main ECM on some vehicles.
Symptoms
- Engine misfires
- Poor running
- Check Engine Light
- Reduced power
- Fuel injector faults
Common Causes
- Injector driver module failure
- CAN bus wiring
- Module power loss
- Fuse blown
Diagnostic Steps
- Check injector driver module fuse
- Test power and ground at module
- Check CAN wiring to module
- Try direct communication
- Check for related misfire codes
Where to start: Check power supply to injector driver module. Common on diesel vehicles with separate injector controllers.
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