Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC U0105: Lost Communication With Fuel Injector Control Module: General Description
This vehicle has a Control Area Network CAN bus system. CAN is a method of communication between the PCM and other control units. Some of the other control units that could be on the CAN lines are PCM, TCM, ESC PCM, ABS and BCM. The CAN consist of a 2 wire network, a high and a low wire. A vehicle can have two CAN systems. A High Speed CAN for engine, trans and ABS and a Low Speed CAN for BCM and windows.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.