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Engine-Codes – Generic – U0108

U0108 Code - Lost Communication With Alternative Fuel Control Module

Quick Answer

The U0108 code indicates that the vehicle has lost communication with the Alternative Fuel Control Module. Common causes include Faulty wiring or connectors leading to the Alternative Fuel Control Module, Malfunction within the Alternative Fuel Control Module, Communication error within the vehicle's network system. 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
U0108 indicates Lost Communication With Alternative Fuel Control Module.
Common causes
Common causes include Faulty wiring or connectors leading to the Alternative Fuel Control Module, Malfunction within the Alternative Fuel Control Module, Communication error within the vehicle's network system.
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 09, 2024
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Code U0108 Description

The U0108 code indicates that the vehicle has lost communication with the Alternative Fuel Control Module. This module is responsible for managing the operation of alternative fuel systems, such as those found in hybrid or electric vehicles. When communication is lost with this module, it can lead to a variety of performance issues and potential long-term effects if not addressed promptly.

OBDII Code U0108 - Lost Communication With Alternative Fuel Control Module
U0108 Code - Lost Communication With Alternative Fuel Control Module

Common Causes of U0108

  1. Faulty wiring or connectors leading to the Alternative Fuel Control Module
  2. Malfunction within the Alternative Fuel Control Module
  3. Communication error within the vehicle's network system
  4. Corrosion or damage to the module connectors
  5. Software issues within the module

Symptoms of U0108

  1. Decreased fuel efficiency
  2. Engine misfires
  3. Vehicle stalling or not starting
  4. Check engine light illuminated
  5. Loss of power or acceleration

How to Fix U0108

  1. Perform a thorough inspection of the wiring and connectors leading to the Alternative Fuel Control Module to check for any damage or corrosion.
  2. Use a diagnostic scan tool to communicate with the module and check for any error codes or communication issues.
  3. If necessary, replace the Alternative Fuel Control Module with a new one and reprogram it to communicate with the vehicle's network system.
  4. Clear the error codes and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, consult with a professional technician to further diagnose the issue and address any underlying mechanical issues.

Cost to Fix U0108

The typical repair costs for addressing a U0108 code can vary depending on the extent of the issue and the specific make and model of the vehicle. In general, the cost of replacing an Alternative Fuel Control Module can range from $300 to $800, including parts and labor. However, additional diagnostic time and labor rates at auto repair shops can influence the overall cost. It is recommended to consult with a local repair shop for a more accurate estimate based on your vehicle's specific needs.

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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 U0108 Code

1. What are the common symptoms of OBDII code U0108 (Lost Communication With Alternative Fuel Control Module)?

The common symptoms include engine stalling, poor fuel economy, rough idling, and difficulty starting the vehicle.

2. What are the possible causes of OBDII code U0108?

The code U0108 can be caused by issues such as a faulty alternative fuel control module, damaged wiring or connectors, a blown fuse, or a software malfunction.

3. How can I diagnose OBDII code U0108?

Diagnosing code U0108 involves using a scan tool to retrieve the code, checking for any other related codes, inspecting the wiring and connectors for damage, and testing the alternative fuel control module.

4. How can I repair OBDII code U0108?

To repair code U0108, you may need to replace the alternative fuel control module if it is faulty, repair any damaged wiring or connectors, replace blown fuses, and perform a reprogramming or software update if necessary.

5. Can I drive my vehicle with OBDII code U0108?

It is not recommended to drive your vehicle with code U0108 as it can lead to further damage and potential safety hazards. It is best to address the issue promptly.

6. How much does it cost to fix OBDII code U0108?

The cost of fixing code U0108 can vary depending on the underlying cause and the extent of the repair needed. It is advisable to consult a professional mechanic for an accurate diagnosis and cost estimate.

7. Is OBDII code U0108 a serious issue?

Code U0108 should be addressed promptly as it can cause drivability issues and affect the performance of the vehicle. Ignoring the code may lead to more severe problems over time.

8. Can a DIY enthusiast fix OBDII code U0108?

While some basic troubleshooting steps can be taken by a DIY enthusiast, diagnosing and repairing code U0108 may require specialized tools and expertise. It is recommended to seek professional help for proper diagnosis and repair.

9. How long does it take to fix OBDII code U0108?

The time required to fix code U0108 can vary depending on the specific cause and the complexity of the repair. Some cases may be resolved quickly, while others may take more time for thorough diagnosis and repair.

10. How can I prevent OBDII code U0108 from occurring?

To prevent code U0108, it is essential to perform regular maintenance on your vehicle, including checking the wiring and connectors for any signs of damage, and promptly addressing any related issues that may arise.

1. What are the common symptoms of OBDII code U0108 - Lost Communication With Alternative Fuel Control Module?

- Common symptoms include issues with the vehicle's fuel efficiency, poor engine performance, stalling, and difficulty starting the engine.

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