U0105 — Lost Communication with Fuel Injector Control Module
What it means: Lost Communication with Fuel Injector Control Module.
How serious / can you keep driving: Critical. Stop as soon as it's safe.
Check first: Check FICM power/ground
Don't risk it — look up listed providers near you and give them this code when you call.
Listed providers nearest Oklahoma City, OK
Closest first. Tell them U0105 and what the truck is doing. RoadService.app lists these providers and does not employ them or carry out the repair.
- 0.0 mi away — based in Oklahoma City, OK · (405) 551-3320
- 0.0 mi away — based in Oklahoma City, OK · (405) 682-1362
- 0.0 mi away — based in Oklahoma City, OK · (405) 632-6010
Seen on: Heavy Truck/Diesel
What U0105 means
Lost Communication with Fuel Injector Control Module. Common causes: FICM not on CAN bus.
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
Lost Communication with Fuel Injector Control Module. Common causes: FICM not on CAN bus.
Critical — Stop as soon as it's safe.
The most common cause is: FICM not on CAN bus. Other possibilities include FICM power/ground; CAN fault; failed FICM.
Stop as soon as it's safe. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Related codes
Codes that commonly appear alongside U0105, or share the same subsystem.
- ECU Power Supply — Intermittent / Erratic (SPN 627 FMI 2)
- Battery / Charging Voltage — Low (SPN 168 FMI 18)
- Engine Controller (ECM) — Internal Fault (SPN 629 FMI 12)
- Battery voltage low during crank (SPN 168 FMI 17)
- J1939 proprietary datalink lost (SPN 625 FMI 9)
- J1939 Data Link — Communication Error (SPN 639 FMI 2)
- High Speed CAN Bus Fault (U0001)
- Lost Communication with ECM/PCM (U0100)
Same symptom: Fuel delivery
Other codes on the tank-to-injector path — pressure, filters, water and the pump.
- Injector Metering Rail 1 Pressure - Data Valid But Below Normal Operating Range (XPI common rail fuel pressure too low) (SPN 157 FMI 1) · Fuel System
- Fuel System Leak Detected - Large Leak (P0093) · Fuel System
- HP Fuel Rail Pressure Low During Power Enrichment (P1093) · Fuel System
- High-Pressure Fuel System Relief Valve Open (P2BAD) · Fuel System
- Injector Metering Rail 1 Pressure - Data Valid But Above Normal Operating Range (XPI common rail fuel pressure too high) (SPN 157 FMI 0) · Fuel System
- Injection Rail Pressure — Below Normal (SPN 157 FMI 18) · Fuel System
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.