AutoCodes – Ford – U0109 2012 Ford Fusion

U0109 2012 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 2012 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 4,711

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 2012 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 2012 Ford Fusion - Lost Communication With Fuel Pump Control Module - AutoCodes.com — U0109 2012 Ford Fusion Code - Lost Communication With Fuel Pump Control Module

What does this mean?

What are the Possible Causes of the DTC U0109 2012 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 2012 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 2012 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 2012 Ford Fusion code?

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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.