U0105

Lost Communication With Fuel Injector Control Module

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$33–167 (est.)

Symptoms

Engine won't start
Engine failures
Check Engine Light Is On
Reduced engine power
Increased fuel consumption

Causes

Open or short circuit in the communication circuit
Faulty injector control module
Module power problems
ECU malfunction
Corrosion of connector contacts

How to Fix

Check the integrity of the wiring harness to the module
Check the power supply and ground of the module
Inspect connectors for corrosion
Check the CAN bus for a break
Diagnose/replace the injector control module

Related codes

U0100 U0101 U0121