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U0109 Chevrolet Code - Lost Communication With Fuel Pump Control Module

Quick Answer

The U0109 diagnostic trouble code (DTC) for Chevrolet vehicles indicates a communication issue with the Fuel Pump Control Module (FPCM). Common causes include Faulty Fuel Pump Control Module, Damaged wiring or connectors, Corrosion in electrical connections. 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
U0109 Chevrolet indicates Lost Communication With Fuel Pump Control Module .
Common causes
Common causes include Faulty Fuel Pump Control Module, Damaged wiring or connectors, Corrosion in electrical connections.
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 07, 2024
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Code U0109 Chevrolet Description

The U0109 diagnostic trouble code (DTC) for Chevrolet vehicles indicates a communication issue with the Fuel Pump Control Module (FPCM). The Fuel Pump Control Module is responsible for managing the fuel pump's operation, ensuring the right amount of fuel is supplied to the engine. When communication is lost with this module, it can lead to a variety of performance issues and potential safety concerns.

OBDII Code U0109 Chevrolet - Lost Communication With Fuel Pump Control Module
U0109 Chevrolet Code - Lost Communication With Fuel Pump Control Module

Common Causes of U0109 Chevrolet

  1. Faulty Fuel Pump Control Module
  2. Damaged wiring or connectors
  3. Corrosion in electrical connections
  4. Network communication issues within the vehicle's system
  5. Software glitches or programming errors

Symptoms of U0109 Chevrolet

  1. Engine stalling or hesitation
  2. Difficulty starting the vehicle
  3. Reduced fuel efficiency
  4. Check Engine Light illuminated
  5. Loss of power while driving

How to Fix U0109 Chevrolet

  1. Perform a thorough diagnostic scan to retrieve the DTC and pinpoint the communication issue with the Fuel Pump Control Module.
  2. Inspect the wiring and connectors related to the Fuel Pump Control Module for any damage or corrosion. Repair or replace as necessary.
  3. Test the Fuel Pump Control Module for proper operation and communication. Replace if faulty.
  4. Clear the DTC and reset the vehicle's system to ensure proper communication between modules.
  5. Test drive the vehicle to verify that the issue has been resolved and that the Fuel Pump Control Module is functioning correctly.

Cost to Fix U0109 Chevrolet

The typical repair costs for addressing a U0109 code can range from $200 to $500, depending on the specific cause of the communication failure and the price of parts and labor. It's important to note that diagnostic time and labor rates can vary, so it's advisable to obtain a quote from a reputable auto repair shop or dealership. Keep in mind that rates may be higher in metropolitan areas or at dealerships, while independent shops may offer more competitive pricing.

What does this mean?

Tech Notes for U0109 Chevrolet

There is a factory service bulletin for the following Chevrolet models:
2007-2010 Chevrolet Avalanche
2007-2010 Chevrolet Corvette
2007-2010 Chevrolet Silverado
2007-2010 Chevrolet Suburban
2007-2010 Chevrolet Tahoe
2008-2010 Chevrolet Silverado Hybrid
2008-2010 Chevrolet Tahoe Hybrid
Chevrolet Factory Service Bulletin OBDII Code U0109

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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 U0109 Chevrolet Code

1. What does the OBDII code U0109 for Chevrolet mean?

The code U0109 indicates a communication problem between the car's engine control module (ECM) and the fuel pump control module.

2. What are the common symptoms of U0109 in a Chevrolet vehicle?

Common symptoms include issues with starting the vehicle, stalling, poor engine performance, and possibly a non-functioning fuel pump.

3. What are the possible causes of the U0109 code in a Chevrolet?

Potential causes include faulty wiring or connections between the ECM and fuel pump control module, a defective fuel pump control module, or a malfunctioning ECM.

4. How can I diagnose the U0109 code in my Chevrolet?

Diagnosing the U0109 code typically involves checking the wiring and connections between the ECM and fuel pump control module, testing the fuel pump control module for proper function, and scanning for any other related trouble codes.

5. Is it safe to continue driving with the U0109 code in my Chevrolet?

It is not recommended to drive the vehicle with the U0109 code present, as it can lead to potential fuel pump failure and further damage to the vehicle.

6. Can I repair the U0109 code in my Chevrolet myself?

While some basic troubleshooting steps can be taken, resolving the U0109 code often requires specialized diagnostic equipment and expertise, so it is recommended to seek professional help.

7. How much does it typically cost to repair the U0109 code in a Chevrolet?

The cost of repairing the U0109 code can vary depending on the exact cause of the issue, but it may range from a couple of hundred dollars to over a thousand dollars, including parts and labor.

8. Are there any preventive measures to avoid the U0109 code in a Chevrolet?

Regular vehicle maintenance, including checking the electrical connections and components related to the fuel pump control module, can help prevent issues that may trigger the U0109 code.

9. Can a U0109 code be intermittent in a Chevrolet?

Yes, the U0109 code can sometimes be intermittent, meaning it may come and go, making it more challenging to diagnose. In such cases, a thorough inspection is necessary to identify the underlying issue.

10. How long does it usually take to repair the U0109 code in a Chevrolet?

The repair time for the U0109 code can vary based on the specific cause of the problem, but it may take anywhere from a few hours to a day or more, depending on the complexity of the repair needed.

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