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U0109 Ford 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 Ford 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 45,602
How popular is this code, among other codes? Medium
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Table of contents Created and updated by William Orellana on Jul 02, 2020
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Code U0109 Ford 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 Ford - Lost Communication With Fuel Pump Control Module - AutoCodes.com
U0109 Ford Code - Lost Communication With Fuel Pump Control Module
What does this mean?

What are the Possible Causes of the DTC U0109 Ford?

  • 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 Ford?

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 does this mean?

Code Tech Notes

There is a Factory Service Bulletin for the 2012-2016 Ford F-Super Duty:
2012-2016 Ford F-Super Duty Factory Service Bulletin OBDII Code U0109

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U0109 Ford 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 Ford code?

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

Need Help with the Code?

Get the U0109 Ford code diagnosed by a professional: Find a repair shop in your area

Information for Specific Ford Models

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 Ford Code

No Frequently Asked Questions about U0109 Ford Code found.

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  • Occured after I replaced Upper radiator hoses. Also removed Air intake hose, believe there is a short occuring from me moving items.

    Also shows:
    cylinder head temp out of range
    Fuel pump control module open circuit
    All 8 injector circuits open.

    Searching for bad electrical connections. Near repair area.

    Reply to Comment
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