Lost Communication With Fuel Injector Control Module
The U0105 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Fuel Injector Control Module. This is a critical severity code.
- Keep driving?
- No -- stop driving
- DIY difficulty
- hard
- Estimated cost
- $200 - $1000 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- Check Engine Light illuminated
- Engine may not start
- Engine runs rough or misfires
- Loss of fuel injection control
Probable Causes (Ranked by Likelihood)
- Failed fuel injector control module Very High
- CAN bus wiring fault to injector module High
- Corroded injector module connector Moderate
- Module power supply failure Moderate
Step-by-Step Diagnostic Procedure
-
Check injector module power and ground circuits
-
Inspect module connector for corrosion
-
Verify CAN bus wiring to the module
-
Check if injectors fire with a noid light
-
Replace injector control module if communication lost
Frequently Asked Questions
Can I drive with code U0105?
Do not drive. Lost communication codes indicate a module has stopped communicating on the vehicle network. The affected system is completely inoperative.
What causes U0105?
The most common cause is a failed module or a wiring issue in the CAN bus network. Failed fuel injector control module is the most likely cause. Power supply, ground, and connector issues should be checked before replacing any module.
Is U0105 expensive to fix?
Repair costs range from $200 - $1000 (parts and labor). Wiring repairs are on the lower end, while module replacement is on the higher end. The module may also need to be programmed after replacement.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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