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U0109 2012 Ford Fusion Code - Lost Communication With Fuel Pump Control Module

Quick Answer

The U0109 diagnostic trouble code (DTC) for a 2012 Ford Fusion indicates that there is a communication problem between the vehicle's engine control module (ECM) and the fuel pump control module. Common causes include Faulty fuel pump control module, Corroded or damaged wiring/connectors between the ECM and fuel pump control module, Software issues within the ECM or fuel pump control module. 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 2012 Ford Fusion indicates Lost Communication With Fuel Pump Control Module .
Common causes
Common causes include Faulty fuel pump control module, Corroded or damaged wiring/connectors between the ECM and fuel pump control module, Software issues within the ECM or fuel pump control module.
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 14, 2024
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Code U0109 2012 Ford Fusion Description

The U0109 diagnostic trouble code (DTC) for a 2012 Ford Fusion indicates that there is a communication problem between the vehicle's engine control module (ECM) and the fuel pump control module. This means that the ECM is unable to receive or send data to the fuel pump control module, which can lead to issues with fuel delivery and engine performance. The fuel pump control module is responsible for regulating the fuel pump's operation, ensuring that the correct amount of fuel is delivered to the engine at all times. When communication is lost between these two modules, it can result in poor fuel efficiency, rough idling, stalling, and even engine misfires.

OBDII Code U0109 2012 Ford Fusion - Lost Communication With Fuel Pump Control Module
U0109 2012 Ford Fusion Code - Lost Communication With Fuel Pump Control Module

Common Causes of U0109 2012 Ford Fusion

  1. Faulty fuel pump control module
  2. Corroded or damaged wiring/connectors between the ECM and fuel pump control module
  3. Software issues within the ECM or fuel pump control module
  4. Electrical interference from other components in the vehicle
  5. Water damage or exposure to moisture affecting the modules

Symptoms of U0109 2012 Ford Fusion

  1. Engine stalling or hesitation during acceleration
  2. Rough idling or misfiring
  3. Decreased fuel efficiency
  4. Check Engine Light illuminated on the dashboard
  5. Difficulty starting the vehicle

How to Fix U0109 2012 Ford Fusion

  1. Begin by conducting a thorough inspection of the wiring and connectors between the ECM and fuel pump control module. Repair or replace any damaged or corroded components.
  2. Check for any software updates or reprogramming that may be available for the ECM and fuel pump control module. Update the software as needed.
  3. Test the fuel pump control module for functionality and replace it if necessary.
  4. Clear the DTC from the vehicle's memory using a diagnostic scan tool.
  5. Perform a road test to ensure that the communication issue has been resolved and that the vehicle is operating properly.

Cost to Fix U0109 2012 Ford Fusion

The typical repair costs for addressing a U0109 code on a 2012 Ford Fusion can range from $200 to $500, depending on the specific cause of the communication issue and the cost of parts and labor. It is important to note that diagnosis time and labor rates at auto repair shops can vary, so it is advisable to check with local shops for a more accurate estimate. Keep in mind that rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive pricing.

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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 2012 Ford Fusion Code

1. What does the OBDII code U0109 on a 2012 Ford Fusion mean?

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

2. What are the common symptoms of a U0109 code in a 2012 Ford Fusion?

Common symptoms of a U0109 code include engine stalling, hard starting, or the fuel pump not activating.

3. What are the possible causes of a U0109 code in a 2012 Ford Fusion?

Possible causes of a U0109 code include a faulty fuel pump control module, damaged wiring or connectors, or a malfunctioning ECM.

4. How can I diagnose a U0109 code in my 2012 Ford Fusion?

Diagnosing a U0109 code involves checking the wiring and connectors between the ECM and fuel pump control module, testing the fuel pump control module for proper function, and ensuring the ECM is functioning correctly.

5. How can I repair a U0109 code in my 2012 Ford Fusion?

Repairing a U0109 code may involve replacing the fuel pump control module, repairing any damaged wiring or connectors, or reprogramming the ECM to establish communication.

6. Can a U0109 code in a 2012 Ford Fusion cause any other issues?

Yes, a U0109 code can cause issues such as poor fuel efficiency, engine misfires, and overall drivability problems due to the fuel pump not functioning properly.

7. Is it safe to continue driving with a U0109 code in a 2012 Ford Fusion?

It is not recommended to drive with a U0109 code present, as it can lead to potential fuel delivery issues and engine performance problems.

8. How much does it typically cost to repair a U0109 code in a 2012 Ford Fusion?

The cost of repairing a U0109 code can vary depending on the specific cause of the issue, but it may range from a few hundred dollars for parts and labor.

9. Can a U0109 code be intermittent in a 2012 Ford Fusion?

Yes, a U0109 code can sometimes be intermittent, meaning the communication issue between the ECM and fuel pump control module may come and go, leading to sporadic symptoms.

10. Is it possible to prevent a U0109 code from occurring in a 2012 Ford Fusion?

Regular vehicle maintenance, including checking and maintaining the fuel pump system components, can help prevent issues that may trigger a U0109 code in a 2012 Ford Fusion.

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