OBD-II code · Network
U0105 Lost Communication with Fuel Injector Control Module
The Fuel Injector Control Module has stopped transmitting on the vehicle data bus, so other control units no longer receive its messages. Injection-timing data is lost, which can stall the engine or prevent a start. Typical causes are loss of power or ground at the module, an open or shorted CAN/LIN bus wire, a connector fault, or an internal module failure.
Is it safe to drive with U0105?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyInjector control module unpowered
- PossibleCAN wiring to FICM broken
- Less likelyGateway module routing CAN messages incorrectly
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–6 h
- Emissions test
- Likely to fail
- Parts involved
- Fuel Injector Control Module, Can Bus Wiring
Related codes
- U0102Lost Communication with Transfer Case Control Module
- U0103Lost Communication with Gear Shift Module
- U0104Lost Communication with Cruise Control Module
- U0106Lost Communication with Glow Plug Control Module
- U0107Lost Communication with Throttle Actuator Control Module
- U0108Lost Communication With Alternative Fuel Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.