P0627 on 2012-2016 Ford F-450 SD: Fuel Pump Control Circuit Causes and Fixes

What's Unique About the 2012-2016 Ford F-450 SD

For this specific generation of Ford Super Duty trucks with the 6.2L or 6.8L gas engines, Ford issued a Technical Service Bulletin (TSB 16-0060) acknowledging that P0627, often along with codes P025A, P025B, and/or U0109, can occur on vehicles built on or before April 6, 2016. This indicates a known weakness in the fuel pump control system. The problem is frequently traced to the Fuel Pump Driver Module (FPDM) or its associated wiring, which is mounted on a frame crossmember above the spare tire. This location exposes it to road salt, moisture, and debris, making it highly susceptible to corrosion and physical damage, which is the primary reason this code is common on these trucks.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• Check Engine Light (Malfunction Indicator Lamp) is on
• Engine cranks but will not start
• Engine starts briefly then stalls
• Hesitation or loss of power while driving
• Unpredictable stalling
• Engine runs rough or misfires
• Whining noise from the fuel tank area

Most Likely Causes

1. Damaged Wiring or Connector at Fuel Pump Driver Module (FPDM) 🔴 High Probability → Shop Fuel Pump Ford TSB #16-0060 specifically addresses this code on these trucks, pointing to an intermittent or partial disconnect in the fuel system wiring. The FPDM is located on a frame crossmember, often above the spare tire, exposing it to moisture, road salt, and debris which causes corrosion and damage to the connector and wiring harness. The ground wire for the module is also a common failure point.
   How to confirm: Visually inspect the wiring harness and connector for the Fuel Pump Driver Module (FPDM). Look for any signs of corrosion (green or white powder), chafed or broken wires, or loose/pushed-out pins. The module is located on a frame crossmember, accessible after lowering the spare tire. 🎬 See how to access the module on a Super Duty frame. Pay close attention to the ground point (often designated G401 on similar platforms) on the frame rail near the module for looseness or corrosion.
   Typical fix: Repair the damaged section of the wiring harness and clean the connector terminals with electrical contact cleaner. If corrosion is severe, the connector pigtail may need to be replaced. 🎬 Watch: How to fix a corroded fuel pump connector and pigtail. Ensure the ground connection is clean, tight, and protected. Some owners apply dielectric grease to the connector as a preventative measure.
   Est. part cost: $20-$150
2. Faulty Fuel Pump Driver Module (FPDM) 🟡 Medium Probability → Shop Fuel Pump The FPDM is an electronic module that can fail over time due to heat, vibration, and internal component degradation. Its location on the frame makes it vulnerable to physical damage and corrosion, which can lead to internal failure or a cracked housing. It is the component directly implicated by TSB 16-0060.
   How to confirm: After confirming the wiring and connector are in good condition, the FPDM is the next likely culprit. Diagnosis can involve using a scan tool to check for communication with the module (a related U0109 code strongly suggests an FPDM issue). If power and ground to the module are good, but there is no output to the pump, the module has likely failed. Swapping with a known-good module is a common and effective diagnostic step.
   Typical fix: Replace the Fuel Pump Driver Module. This is typically a straightforward bolt-on, plug-in replacement. 🎬 Watch: Step-by-step guide to replacing the fuel pump driver module.
   Est. part cost: $70-$200
3. Failed In-Tank Fuel Pump ⚪ Low Probability → Shop Fuel Pump While the fuel pump itself can fail, the P0627 code specifically points to a control circuit issue, which on these trucks is most often external to the tank. A pump failure is less likely to be the root cause unless it has an internal short that damages the control circuit or FPDM.
   How to confirm: If the FPDM and wiring are confirmed to be good, you can test for power being sent to the fuel pump at the tank connector. If the pump is receiving correct voltage from the FPDM but is not running (no humming sound from the tank at key-on), the pump has likely failed.
   Typical fix: Replace the in-tank fuel pump and sender assembly. This requires dropping the fuel tank.
   Est. part cost: $250-$500

Rare But Worth Checking

• Powertrain Control Module (PCM) Failure: → Shop Engine Control Module (ECM) This is the least likely cause. The PCM is a robust computer, and failure is rare. Before condemning the PCM, all other possibilities, including wiring, fuses, the FPDM, and the FPDM relay, must be exhaustively ruled out.
• Blown Fuse or Faulty Relay: A blown fuse for the fuel pump circuit or a faulty fuel pump relay can also cause a P0627 code. One owner on a forum reported fixing the issue by discovering a fuel pump diode was placed in the wrong slot in the fuse box. Always check the simple things first.

Diagnosis Steps

1. Scan for all diagnostic trouble codes. Note if P0627 is present with U0109, P025A, or P025B, as this strongly points to the issue described in TSB 16-0060.
2. Check the fuse for the fuel pump circuit in the power distribution box. On some models, this may also involve a relay or diode.
3. Safely raise the vehicle and lower the spare tire to gain access to the Fuel Pump Driver Module (FPDM) on the frame crossmember above the spare tire's location.
4. Disconnect the FPDM electrical connector. Thoroughly inspect both the harness side and the module side for any signs of corrosion (green/white powder), moisture, bent/pushed-out pins, or melted plastic.
5. Inspect the wiring leading to the FPDM connector for any chafing, breaks, or corrosion, especially where it is secured to the frame or passes through connectors.
6. Inspect the ground wire connection for the FPDM. Ensure it is clean, tight, and free of corrosion. A bad ground is a common cause.
7. If wiring and connector issues are found, repair them. If the connector is damaged, replace the pigtail.
8. If no wiring issues are found, the FPDM itself is the most likely failed component. Replacing it is the next logical step.
9. If replacing the FPDM does not resolve the issue, the final steps would be to test the circuit for continuity between the PCM and the FPDM, and to test for voltage and ground at the FPDM connector with the key on.
10. As a last resort, test for power at the in-tank fuel pump connector to rule out a pump failure.

Parts You'll Likely Need

• Fuel Pump Driver Module (OEM #FL3Z-9D370-A (Note: Part numbers are frequently superseded. Verify with VIN. Other potential numbers include LC3Z-9D370-C, FL1Z-9D370-A).) — This module controls the voltage to the fuel pump and is a very common failure point for this code on Ford trucks, as identified in TSBs and numerous owner accounts.
  Trusted brands: Motorcraft, Dorman, Standard Motor Products
  OEM price range: $120-$200
  Aftermarket price range: $70-$150
• Fuel Pump Driver Module Connector Pigtail — If the wiring connector is corroded or damaged beyond cleaning, replacing the pigtail is necessary to ensure a solid connection to the new module.
  Trusted brands: Motorcraft, Dorman
  OEM price range: $40-$70
  Aftermarket price range: $20-$40

Related Codes That Often Appear With This One

• U0109 — This code means 'Lost Communication With Fuel Pump Control Module'. It frequently appears with P0627 because the same wiring fault (open power, ground, or communication wire) or FPDM failure that causes the open circuit also disrupts communication between the FPDM and the PCM.
• P025A — 'Fuel Pump Module 'A' Control Circuit/Open'. This is another code pointing to the same general fault area and is mentioned alongside P0627 in Ford's TSB #16-0060.
• P025B — 'Fuel Pump Module 'A' Control Circuit Range/Performance'. This code also points to the fuel pump control circuit and is listed in TSB #16-0060 as a related code.

Technical Service Bulletins (TSBs) & Recalls

• 16-0060: Addresses an illuminated MIL with DTCs P0627, P025A, P025B and/or U0109 on 6.2L or 6.8L Super Duty vehicles built on or before 4/6/2016. The service procedure involves insp

Platform-Specific Known Issues

• Ford Technical Service Bulletin #16-0060 was issued for 2012-2016 Super Duty trucks with 6.2L or 6.8L engines, built on or before 4/6/2016, that may exhibit an illuminated MIL with DTCs P0627, P025A, P025B and/or U0109. This bulletin points directly to a known issue with the fuel pump control system on these specific vehicles.
• The location of the Fuel Pump Driver Module (FPDM) above the spare tire makes it a magnet for moisture and road salt, leading to a high failure rate of the module itself or its electrical connector due to corrosion.

Mechanic-Grade Diagnostic Values

• FPDM Power Supply Voltage — expected: 12V (Battery Voltage). Failure: A reading of 0V or significantly less than 12V indicates an open circuit in the power feed wire from the fuel pump relay.
• FPDM PCM Control Wire Voltage (with multimeter) — expected: ~6V. Failure: This wire receives a pulse-width modulated signal, so a standard multimeter will average the reading. A reading of 0V or 12V could indicate a problem, but an oscilloscope is needed for proper diagnosis.
• Fuel Pump Dead-Head Pressure Test — expected: Must maintain at least 70 PSI.. Failure: If the pump cannot maintain 70 PSI when directly powered, the in-tank pump itself is weak or failing, assuming battery voltage is good.

Scan Tool Commands That Help

• Ford IDS (Integrated Diagnostic System): Self Test > All CMDTCs — To retrieve all continuous memory diagnostic trouble codes from all modules, which is crucial for seeing related codes like U0109 that often accompany P0627.
• Ford IDS (Integrated Diagnostic System): Datalogger > Fuel System — To monitor live data from the fuel system, including FPDM status and fuel pressure, to see if the module is communicating and responding to commands.
• Ford IDS (Integrated Diagnostic System): Powertrain > Service Functions > PCM > Fuel Injector Correction Factors — While not directly for P0627, this function is used after major fuel system or PCM work to ensure the engine runs correctly. It shows the level of diagnostic capability available in IDS for the fuel system.

Wiring & Ground Locations

• G401 — On the left frame rail, near the Fuel Pump Driver Module (FPDM).. This is the primary chassis ground for the FPDM. A loose or corroded connection here will cause an open in the control circuit and/or loss of communication, triggering P0627 and U0109.
• FPDM Connector (C4336 on some models) — On the frame crossmember, above the spare tire, connecting to the FPDM.. This connector is the most common failure point due to its exposure to moisture and road salt, leading to corrosion, pushed-out pins, and open circuits as cited in Ford TSBs.
• FPDM Connector Pin 1 (Violet/Green Wire) — Pin 1 of the FPDM electrical connector.. This is the 12-volt power feed from the fuel pump relay. A voltage test at this pin is a primary diagnostic step; 0V confirms an open circuit upstream in the harness or a bad relay/fuse.
• FPDM Connector (Yellow/Orange Wire) — A pin on the FPDM electrical connector.. This is the control wire from the PCM that sends a pulse-width modulated signal to the FPDM. A break in this wire will cause a P0627.

Real Owner Repair Stories

• 2CarPros forum user 'Tiny' (2018 Ford F-250 6.2L V8 (similar platform)) — Crank no start after a long drive. No fuel from lines.
  ❌ Tried (didn't work) Replaced fuel pump with Motorcraft part., Replaced Fuel Pump Control Module (FPCM/FPDM) with aftermarket part.
  ✅ What actually fixed it The user found that after checking wiring from the fuse box to the FPCM and re-installing the fuse, voltage returned and the truck started. The final fix was replacing the fuel pump fuse and relay, as the old relay had a delayed click, indicating it was failing intermittently and causing the intermittent no-start.

OEM Part Supersession History

• lc3z9d370a → LC3Z-9D370-C — Part revision by manufacturer.
• AA8Z-9D370-A → GA8Z-9D370-A — Part revision by manufacturer for other Ford platforms, indicates a pattern of updates to this component type.