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U0105 — Lost Communication with Fuel Injector Control Module
CriticalNetwork/CANStop as soon as it's safe
Seen on: Heavy Truck/Diesel
Lost Communication with Fuel Injector Control Module. Common causes: FICM not on CAN bus.
Don't risk it — get a diesel tech on the truck.
Look up listed providers near you and give them this code when you call.
How serious is it?
Critical. Stop as soon as it's safe.
Most likely causes
- FICM not on CAN bus
- FICM power/ground
- CAN fault
- failed FICM
First moves (roadside)
- Check FICM power/ground
- test CAN bus
- replace FICM if confirmed failed
FAQ
What does U0105 mean?
Lost Communication with Fuel Injector Control Module. Common causes: FICM not on CAN bus.
How serious is U0105?
Critical — Stop as soon as it's safe.
What's the most likely cause of U0105?
The most common cause is: FICM not on CAN bus. Other possibilities include FICM power/ground; CAN fault; failed FICM.
Can I keep driving with U0105?
Stop as soon as it's safe. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Throwing this code right now?
Find a mechanic or related guides
General diagnostic guidance for diesel engines (Cummins, Detroit, PACCAR, Volvo, Mack and more). Not a substitute for a scan-tool diagnosis on your specific truck.