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U0105 Chevrolet Code - Lost Communication With Fuel Injector Control Module

Quick Answer

The U0105 diagnostic trouble code (DTC) for Chevrolet vehicles indicates that there has been a communication failure between the engine control module (ECM) and the fuel injector control module (FICM). Common causes include Faulty fuel injector control module (FICM), Damaged or corroded wiring/connectors between ECM and FICM, Software issues within the ECM. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
U0105 Chevrolet indicates Lost Communication With Fuel Injector Control Module.
Common causes
Common causes include Faulty fuel injector control module (FICM), Damaged or corroded wiring/connectors between ECM and FICM, Software issues within the ECM.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code U0105 Chevrolet Description

The U0105 diagnostic trouble code (DTC) for Chevrolet vehicles indicates that there has been a communication failure between the engine control module (ECM) and the fuel injector control module (FICM). The FICM is responsible for controlling the fuel injectors, which play a crucial role in delivering the correct amount of fuel to the engine cylinders for combustion. When communication is lost between the ECM and FICM, it can lead to various performance issues and ultimately affect the vehicle's overall functionality.

OBDII Code U0105 Chevrolet - Lost Communication With Fuel Injector Control Module
U0105 Chevrolet Code - Lost Communication With Fuel Injector Control Module

Common Causes of U0105 Chevrolet

  1. Faulty fuel injector control module (FICM)
  2. Damaged or corroded wiring/connectors between ECM and FICM
  3. Software issues within the ECM
  4. Electrical interference or noise affecting communication signals
  5. Faulty ECM or FICM

Symptoms of U0105 Chevrolet

  1. Engine misfires
  2. Rough idling
  3. Hesitation or lack of power during acceleration
  4. Reduced fuel efficiency
  5. Engine stalling

How to Fix U0105 Chevrolet

  1. Diagnose the root cause of the communication failure by inspecting wiring, connectors, and modules for damage or faults.
  2. Repair or replace any damaged wiring or connectors between the ECM and FICM.
  3. Test and potentially replace the fuel injector control module (FICM) if deemed faulty.
  4. Check for any software updates or reprogramming needed for the ECM to ensure proper communication with the FICM.
  5. Clear the diagnostic trouble codes and perform a test drive to confirm that the issue has been resolved.

Cost to Fix U0105 Chevrolet

The cost of repairing a U0105 code can vary depending on the specific cause of the communication failure and the extent of the repairs needed. In general, the cost of parts for replacing a fuel injector control module (FICM) can range from $200 to $500, while the labor cost for diagnosis and repair can add another $100 to $300. Overall, the total cost of addressing a U0105 code may range from $300 to $800 at an auto repair shop. It is important to note that labor rates and parts prices can vary based on location, vehicle make and model, and the expertise of the technician.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U0105 Chevrolet Code

1. What are the common symptoms of OBDII code U0105 in a Chevrolet related to lost communication with the Fuel Injector Control Module?

- Common symptoms include engine misfires, rough idling, stalling, and poor fuel efficiency.

2. What are the possible causes of OBDII code U0105 in a Chevrolet indicating lost communication with the Fuel Injector Control Module?

- Possible causes include a faulty Fuel Injector Control Module, damaged wiring or connectors, software issues, or a defective Engine Control Module (ECM).

3. How can I diagnose the issue causing OBDII code U0105 in my Chevrolet related to lost communication with the Fuel Injector Control Module?

- Diagnosis typically involves checking the wiring and connectors for any damage, testing the Fuel Injector Control Module, and scanning for additional trouble codes.

4. Can I still drive my Chevrolet with OBDII code U0105 indicating lost communication with the Fuel Injector Control Module?

- It is not recommended to drive your vehicle with this issue as it can lead to poor engine performance and potential further damage.

5. How can I repair OBDII code U0105 in my Chevrolet due to lost communication with the Fuel Injector Control Module?

- Repair may involve replacing the Fuel Injector Control Module, repairing damaged wiring or connectors, updating software, or reprogramming the ECM.

6. Are there any DIY tips for troubleshooting OBDII code U0105 in a Chevrolet related to lost communication with the Fuel Injector Control Module?

- DIY tips include checking for loose connections, inspecting wires for damage, and ensuring all modules are securely connected and functioning properly.

7. Will resetting the OBDII code U0105 in my Chevrolet solve the issue of lost communication with the Fuel Injector Control Module?

- Resetting the code may temporarily clear the warning light, but the underlying issue causing the communication loss will still need to be addressed for a permanent solution.

8. How much does it typically cost to repair OBDII code U0105 in a Chevrolet related to lost communication with the Fuel Injector Control Module?

- Repair costs can vary depending on the exact cause of the issue, but it may range from a few hundred to a thousand dollars, including parts and labor.

9. Can extreme weather conditions or environmental factors trigger OBDII code U0105 in a Chevrolet indicating lost communication with the Fuel Injector Control Module?

- While rare, extreme weather conditions or environmental factors like moisture ingress can potentially cause communication issues leading to this code.

10. Is OBDII code U0105 specific to Chevrolet vehicles, or can it be found in other car brands as well?

- The U0105 code indicating lost communication with the Fuel Injector Control Module is not specific to Chevrolet and can be found in other car brands using OBDII systems.

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