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U0109 Ford Code - Lost Communication With Fuel Pump Control Module

Quick Answer

The U0109 code for Ford vehicles indicates that there is a communication problem between the Engine Control Module (ECM) and the Fuel Pump Control Module (FPCM). Common causes include Damaged wiring harness, Loose or corroded connectors, Faulty 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 Ford indicates Lost Communication With Fuel Pump Control Module .
Common causes
Common causes include Damaged wiring harness, Loose or corroded connectors, Faulty 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 07, 2024
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Code U0109 Ford Description

The U0109 code for Ford vehicles indicates that there is a communication problem between the Engine Control Module (ECM) and the Fuel Pump Control Module (FPCM). The FPCM is responsible for controlling the fuel pump's operation, ensuring the correct fuel pressure is maintained for optimal engine performance. When communication is lost between these modules, it can lead to issues with fuel delivery, potentially causing the vehicle to stall, hesitate, or have difficulty starting.

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

Common Causes of U0109 Ford

  1. Damaged wiring harness
  2. Loose or corroded connectors
  3. Faulty Fuel Pump Control Module
  4. Software issues
  5. ECM or FPCM failure

Symptoms of U0109 Ford

  1. Engine stalling
  2. Hard starting
  3. Hesitation or lack of power
  4. Check Engine Light illuminated
  5. Fuel pump not priming

How to Fix U0109 Ford

  1. Inspect the wiring harness and connectors for any damage or corrosion. Repair or replace as needed.
  2. Test the Fuel Pump Control Module for functionality and replace if faulty.
  3. Check for any software updates from Ford that may address communication issues between modules.
  4. Clear the trouble codes and perform a test drive to ensure the issue has been resolved.

Cost to Fix U0109 Ford

The cost of repairing a U0109 code on a Ford vehicle can vary depending on the specific cause of the communication failure. On average, you can expect to pay between $200 and $500 for parts and labor. However, this estimate can fluctuate based on the location of the repair shop, the model of the vehicle, and the extent of the repairs needed. It's recommended to consult with a certified mechanic to get an accurate quote for your specific situation. Labor rates typically range from $80 to $150 per hour, with dealership rates possibly higher and independent shop rates potentially lower.

What does this mean?

Tech Notes for U0109 Ford

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

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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

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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