2022-2025 Expedition & Navigator Fuel Pump Control Module: Stalling, No-Start, and Diagnosis

Urgent: Is It Your Module or the Massive Fuel Pump Recall?

Symptoms of a Failing Fuel Pump Control Module

If your vehicle is not part of the recall, or if the fuel pump has already been replaced, the control module itself may be the issue. A failing FPCM cuts power to the fuel pump, starving the engine of fuel. Common symptoms include:

• Engine Cranks but Will Not Start: This is the most common symptom. The starter will turn the engine over, but it won't fire up because no fuel is being delivered. You may also notice you don't hear the faint 2-3 second hum of the fuel pump priming from the rear of the vehicle when you turn the key to the 'On' position.
• Sudden Engine Stalling: The engine may shut off unexpectedly while driving, as if you ran out of gas. This is extremely dangerous as it can cause a loss of power steering and braking assist.
• Intermittent Stalling or Hard Starts: The vehicle may stall randomly and then restart after cooling down, or it may take an unusually long time to start (long crank).
• Hesitation and Loss of Power: Under acceleration, the vehicle may hesitate, surge, or feel sluggish because the module isn't commanding the pump to deliver the necessary fuel volume.
• Check Engine Light: A failing module will often trigger diagnostic trouble codes (DTCs). Common codes include P0627 (Fuel Pump 'A' Control Circuit/Open), P025A (Fuel Pump Module 'A' Control Circuit/Open), P008A (Low Pressure Fuel System Pressure - Too Low), and U0109 (Lost Communication With Fuel Pump Control Module).

How to Diagnose the Problem: A Step-by-Step Guide

Before spending money on parts, follow this diagnostic order to pinpoint the failure.

1. Check Fuses First: Always start with the simplest solution. Locate the fuel pump fuse in the under-hood fuse box (on the passenger side of the engine bay) and verify it is not blown. For the 2022-2023 Expedition, this is typically a 30-amp MCASE fuse at position F4.
2. Inspect the Module Connector (Ford SSM 52483): Ford issued a Special Service Message (SSM 52483) for many trucks and SUVs, including the 2018-2024 Expedition and Navigator, regarding issues with the FPCM wiring connector. The module is located on the driver's side frame rail, often above or near the spare tire. Unplug the connector and inspect the pins for corrosion, moisture, or damage. Clean the terminals with electrical contact cleaner, apply a small amount of dielectric grease to the seal, and ensure the connector clicks firmly back into place. This simple step fixes the problem for many owners.
3. Listen for the Fuel Pump: Have a helper turn the ignition key to the 'On' position (without starting the engine) while you listen near the fuel tank. You should hear a distinct, low-volume hum for 2-3 seconds as the pump primes the system. If you hear nothing, the pump is not getting power, pointing towards the FPCM, its wiring, or the pump itself.

Buying a Used Fuel Pump Control Module: What to Check

If you've determined the module has failed, a used OEM part is an excellent, cost-effective alternative to an expensive new dealer part. Here’s what to look for:

• Verify the Part Number: Ensure the used module has the exact same OEM part number. The correct part for these vehicles is LC3Z-9D370-C. This part supersedes the older version, lc3z9d370a. Do not use a module from a different vehicle, even if it looks identical.
• Inspect the Connector Port: This is the most critical inspection point. Look inside the port where the wiring harness plugs in. The pins should be straight, clean, and free of any green or white corrosion. A module with corroded pins is a bad investment and likely failed due to water intrusion.
• Check the Casing: The module's aluminum casing is mounted under the vehicle, exposing it to road salt and debris. While some external cosmetic corrosion is normal, reject any module with deep corrosion pits, cracks, or a swollen case, as this indicates internal failure.
• Buy from a Reputable Source: Purchase from a recycled parts seller that offers a warranty. This gives you protection in case the part is faulty.
• No Programming Required: The Fuel Pump Control Module on these vehicles does not require any special programming or calibration after installation. It is a plug-and-play replacement.

Cost to Replace the Fuel Pump Control Module

Prices can vary by region and supplier, but this table provides a general cost comparison.

Note: These are estimated prices and do not include taxes or diagnostic fees.

Replacement Overview & Difficulty

• Difficulty: 2 out of 5
• Estimated Time: 0.5 - 1 hour
• Tools Needed: Socket set, ratchet, possibly a flathead screwdriver for connector clips.

The replacement process is generally straightforward for a DIYer with basic tools. The module is typically mounted to the driver's side frame rail with two bolts. The process involves disconnecting the negative battery terminal, safely raising and supporting the rear of the vehicle, locating the module, unplugging the electrical connector, unbolting the old module, and installing the new one in the reverse order. The main challenge can be dealing with rusted bolts due to its exposed location.

Frequently Asked Questions (FAQ)