AutoCodes – Ford – U0109 2008 Ford Fusion

U0109 2008 Ford Fusion Code - Lost Communication With Fuel Pump Control Module

Quick Answer

The Powertrain Control Module (PCM) monitors the Fuel Pump Monitor (FPM) circuit for the presence of a duty cycled signal. Common causes include Fuel pump monitor circuit open or short to ground, Fuel pump monitor circuit short to voltage, Damaged Inertia Fuel Shutoff (IFS) switch (if equipped). 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 2008 Ford Fusion indicates Lost Communication With Fuel Pump Control Module .
Common causes: Common causes include Fuel pump monitor circuit open or short to ground, Fuel pump monitor circuit short to voltage, Damaged Inertia Fuel Shutoff (IFS) switch (if equipped).
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.

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Code Popularity 2,220

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 29, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0109 2008 Ford Fusion Description

The Powertrain Control Module (PCM) monitors the Fuel Pump Monitor (FPM) circuit for the presence of a duty cycled signal. If the FPM circuit is fixed at a low or high voltage, the PCM begins to increment a counter. The test fails when the PCM is still not detecting a duty cycled signal on the FPM circuit after a calibrated amount of time.

OBDII Code U0109 2008 Ford Fusion - Lost Communication With Fuel Pump Control Module - AutoCodes.com — U0109 2008 Ford Fusion Code - Lost Communication With Fuel Pump Control Module

What does this mean?

What are the Possible Causes of the DTC U0109 2008 Ford Fusion?

Fuel pump monitor circuit open or short to ground
Fuel pump monitor circuit short to voltage
Damaged Inertia Fuel Shutoff (IFS) switch (if equipped)
Damaged fuel pump control module relay

How to Fix the DTC U0109 2008 Ford Fusion?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U0109 2008 Ford Fusion code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the U0109 2008 Ford Fusion code?

Need more information on how to fix the U0109 2008 Ford Fusion code? Get Access to Factory Service Manuals

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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 2008 Ford Fusion Code

1. What does the OBDII code U0109 mean on a 2008 Ford Fusion?

The code U0109 indicates a communication problem with the fuel pump control module in the vehicle.

2. What are the common symptoms of the U0109 code in a 2008 Ford Fusion?

Common symptoms include issues with the fuel pump operation, engine stalling, difficulty starting the vehicle, and the check engine light being illuminated.

3. What are the possible causes of the U0109 code in a 2008 Ford Fusion?

Potential causes of the U0109 code include a faulty fuel pump control module, damaged wiring or connectors, software issues, or a problem with the vehicle's network communication system.

4. How can I diagnose the U0109 code on my 2008 Ford Fusion?

Diagnosis typically involves using a professional OBDII scanner to retrieve the specific trouble code, inspecting the wiring and connectors related to the fuel pump control module, and testing the module itself for functionality.

5. Can I drive my 2008 Ford Fusion with the U0109 code present?

It is not recommended to drive the vehicle with the U0109 code present, as it may lead to further damage or safety concerns due to potential fuel pump control issues.

6. How can I repair the U0109 code on my 2008 Ford Fusion?

Repairing the U0109 code involves addressing the root cause, such as replacing the fuel pump control module, repairing damaged wiring or connectors, resetting the module, or reprogramming the vehicle's software.

7. Can I reset the U0109 code on my 2008 Ford Fusion myself?

While you can attempt to clear the code with an OBDII scanner, it is essential to address the underlying issue causing the code to prevent it from reoccurring.

8. Is the U0109 code a common issue in 2008 Ford Fusion vehicles?

The U0109 code may not be as common as some other OBDII codes, but it can still occur due to various factors affecting the fuel pump control module communication.

9. How much does it cost to fix the U0109 code on a 2008 Ford Fusion?

The cost of repairing the U0109 code can vary depending on the specific issue, parts needed, labor costs, and whether the repair is done at a dealership or an independent repair shop.

10. Can a DIY enthusiast fix the U0109 code on a 2008 Ford Fusion?

While some aspects of diagnosing and repairing the U0109 code may be possible for DIY enthusiasts with the right tools and knowledge, it is recommended to consult with a professional mechanic for accurate diagnosis and repair.