P0627 on 2012-2016 Ford F-250 SD: Causes and Fixes for the Fuel Pump Control Circuit

What's Unique About the 2012-2016 Ford F-250 SD

For this generation of Super Duty with the 6.2L or 6.8L gas engines, Ford has specifically identified a recurring issue that causes P0627, often along with codes P025A, P025B, and/or U0109. A Technical Service Bulletin (TSB 16-0060) was issued for vehicles built on or before April 6, 2016, pointing towards a specific component failure. The failure is typically the Fuel Pump Driver Module (FPDM), which has an aluminum case bolted directly to the steel frame crossmember. This leads to galvanic corrosion, compromising the module's electronics and causing the open circuit fault. This makes diagnosis more direct than on other vehicles where P0627 can have broader causes.

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 is on.
• Engine cranks but does not start.
• Engine stalls shortly after starting or while driving.
• Hesitation or loss of power when accelerating.
• Long crank time before the engine starts.
• Reduced engine power or intermittent loss of power while driving.

Most Likely Causes

1. Faulty Fuel Pump Driver Module (FPDM) 🔴 High Probability Ford TSB 16-0060 specifically addresses this code, and the FPDM is the most common failure. The module's aluminum housing is mounted directly to the steel frame above the spare tire, causing galvanic corrosion that destroys the module's internal electronics. This is a well-documented issue across Ford truck platforms.
   How to confirm: Locate the FPDM on the frame crossmember above the spare tire. Inspect its aluminum housing for severe corrosion, swelling, or cracks. Also check the connector (C4336) for corrosion or pushed-out pins. A scan tool showing code U0109 ('Lost Communication With Fuel Pump Control Module') alongside P0627 strongly points to a failed FPDM.
   Typical fix: Replace the Fuel Pump Driver Module. 🎬 Watch: See a professional replace the module on a Super Duty. The replacement part from Dorman (590-001) often includes new mounting hardware with rubber standoffs to prevent direct contact between the aluminum module and steel frame, mitigating future corrosion. A deep 10mm socket is required for the mounting bolts.
   Est. part cost: $50-$100
2. Damaged Wiring or Connectors 🟡 Medium Probability The wiring harness to the FPDM is exposed to road debris, moisture, and salt, which can lead to corrosion in the connector pins or chafing on the frame. The ground point for the FPDM (G401) can also corrode, causing an open circuit.
   How to confirm: Visually inspect the wiring harness and connector C4336 leading to the FPDM. Look for green crust, pushed-out pins, or chafed wires. Check the ground wire's attachment point on the frame for rust and tightness. Use a multimeter to check for 12V power at the violet/green wire 🎬 Watch: How to diagnose P0627 and U0109 circuit faults. and continuity to ground at the black wire on the FPDM connector with the key on.
   Typical fix: Repair the damaged section of the harness or replace the connector pigtail. Clean the ground connection point to bare metal and secure it tightly. Applying dielectric grease to the connector can help prevent future corrosion.
   Est. part cost: $20-$75
3. Failed Fuel Pump ⚪ Low Probability While less common than the FPDM for this specific code, the in-tank fuel pump can fail, creating an open circuit that triggers P0627. This is often misdiagnosed as the primary issue. One owner on the Ford Truck Enthusiasts forum replaced the pump only to find the new one also didn't work, leading them to correctly identify the FPDM circuit as the actual problem.
   How to confirm: After confirming the FPDM and its wiring are good, test for power at the fuel pump connector. A temporary bypass of the FPDM can be performed by jumping specific pins at the module connector to send direct power to the pump, confirming its operation. If power is sent but the pump does not run, the pump has failed.
   Typical fix: Replace the in-tank fuel pump assembly. This requires either lifting the truck bed or dropping the fuel tank.
   Est. part cost: $250-$500

Rare But Worth Checking

• Faulty Powertrain Control Module (PCM): This is the least likely cause. The PCM's internal driver for the fuel pump circuit can fail, but all other possibilities should be exhausted before condemning the PCM.

Diagnosis Steps

1. Scan the PCM for all stored trouble codes. Note if P025A, P025B, U0109, or P1233 are present with P0627, as this strongly suggests an FPDM issue per TSB 16-0060.
2. Check fuse #27 (20A) in the under-hood fuse box (Battery Junction Box), which powers the fuel pump relay.
3. Locate the Fuel Pump Driver Module (FPDM). On Super Duty trucks, it is mounted to a frame crossmember directly above the spare tire. Lowering the spare tire is necessary for access.
4. Visually inspect the FPDM's aluminum housing for heavy white corrosion, cracks, or physical damage. 🎬 See how galvanic corrosion destroys these aluminum modules. This is the most common sign of failure.
5. Inspect the electrical connector (C4336) for corrosion, moisture, or backed-out pins.
6. If corrosion or damage is found on the module, replace the FPDM. It is highly recommended to also replace the connector pigtail if it shows any signs of corrosion.
7. If the FPDM appears visually okay, test the circuit. With the key on, use a multimeter to check for 12V power on the violet/green wire and check for good continuity to ground on the black wire at the FPDM connector.
8. If power or ground is missing, trace the wiring harness back toward the front of the vehicle, looking for breaks or chafing, particularly where the harness runs along the frame rail. Pay special attention to the G401 ground connection on the left frame rail.
9. If the FPDM and its wiring test good, the fuel pump itself is the next suspect. Test for power at the pump connector while an assistant cycles the key. If power is present but the pump doesn't run, the fuel pump has failed.
10. If all other components test good, the final and least likely possibility is a fault within the Powertrain Control Module (PCM).

Parts You'll Likely Need

• Fuel Pump Driver Module (FPDM) (OEM #FL1Z-9D370-A) — This is the most common failure part for code P0627 on this vehicle, as identified by Ford's TSB 16-0060 and numerous owner accounts.
  Trusted brands: Motorcraft, Dorman (p/n 590-001)
  OEM price range: $70-$100
  Aftermarket price range: $40-$80
• FPDM Connector Pigtail (OEM #Motorcraft WPT-1129 / Dorman 645-909) — The electrical connector for the FPDM is prone to corrosion and water intrusion and often needs to be replaced along with the module itself.
  Trusted brands: Motorcraft, Dorman
  OEM price range: $30-$50
  Aftermarket price range: $20-$40
• Fuel Pump Assembly — If the FPDM and wiring are confirmed to be good, the in-tank fuel pump is the next most likely component to have failed.
  Trusted brands: Motorcraft, Delphi, Bosch
  OEM price range: $400-$600
  Aftermarket price range: $250-$450

Related Codes That Often Appear With This One

• P025A — This code for 'Fuel Pump Module 'A' Control Circuit/Open' is often stored with P0627 as they both relate to the fuel pump control circuit. TSB 16-0060 lists them together.
• P025B — This code for 'Fuel Pump Module 'A' Control Circuit Range/Performance' is also mentioned in TSB 16-0060 and points to the same underlying issue with the FPDM or its circuit.
• U0109 — This code means 'Lost Communication With Fuel Pump Control Module'. It directly indicates a problem with the FPDM or its connection to the PCM and is a very strong indicator that the FPDM has failed when seen with P0627.
• P1233 — This is a Ford-specific code for 'Fuel Pump Driver Module Offline or Disabled'. It indicates the PCM has lost communication with the FPDM and strongly points to a failure in the FPDM or its wiring harness.

Technical Service Bulletins (TSBs) & Recalls

• 16-0060: Addresses an illuminated Malfunction Indicator Lamp (MIL) with DTCs P0627, P025A, P025B and/or U0109 on 6.2L or 6.8L engines.

Platform-Specific Known Issues

• TSB 16-0060: Ford issued this bulletin for 2012-2016 Super Duty trucks with 6.2L or 6.8L engines built on or before 4/6/2016 that exhibit DTCs P0627, P025A, P025B, and/or U0109. This points directly to a known issue with the fuel pump control system, with the primary cause being a failed Fuel Pump Driver Module (FPDM).

Mechanic-Grade Diagnostic Values

• Fuel Pressure (Engine Running) — expected: 350-430 kPa (51-62 psi). Failure: Pressure below 51 psi indicates a fuel delivery problem.
• FPDM Control Signal (FPC) from PCM — expected: Duty Cycle signal (approx. 5% at idle, up to 50% at max demand). Failure: No signal or a fixed signal that doesn't vary with engine demand suggests a PCM or wiring issue.
• FPDM Diagnostic Signal to PCM — expected: Duty Cycle signal (typically 50% if OK, 25% or 75% to indicate specific faults). Failure: No return signal from the FPDM to the PCM when the FPDM is powered indicates a failed module.
• FPDM Power Supply — expected: 12V+ at the Violet/Green wire on connector C4336 with key on.. Failure: No voltage indicates a problem upstream (fuse, relay, or wiring).

Hidden / Shadow Codes Worth Checking

• P1233: Fuel Pump Driver Module Offline or Disabled. This is a Ford-specific code indicating the PCM has lost its communication link with the FPDM. (see via A scan tool capable of reading Ford-specific (enhanced) powertrain codes is required.)

Scan Tool Commands That Help

• Ford IDS (Integrated Diagnostic System): Toolbox -> Powertrain -> Fuel System Test — This function in the Ford dealer-level software allows a technician to run a guided test of the entire fuel system, including commanding the pump and monitoring pressure.
• Ford IDS (Integrated Diagnostic System): Data Logger -> Bidirectional Control — Allows a technician to manually take control of and activate individual components like the fuel pump or related solenoids to verify their function independently of the PCM's automatic commands.

Wiring & Ground Locations

• G401 — Middle of the left (driver's side) frame rail.. This is a primary ground point for components on the frame, and corrosion or a break in the ground wire for the FPDM at this location will cause an open circuit and trigger P0627.
• C4336 — The 8-pin electrical connector on the Fuel Pump Driver Module (FPDM) itself, located above the spare tire.. This connector is the single interface for the FPDM. It receives power, ground, and the control signal from the PCM. Corrosion or backed-out pins in this connector are a very common cause of the fault.
• Fuse 27 (Battery Junction Box) — A 20A mini fuse in the under-hood fuse box that provides power to the fuel pump relay.. This fuse is the ultimate source of power for the entire fuel pump circuit. While the fuse itself blowing is uncommon, on related Ford platforms it is known to melt its socket, creating an open circuit.

Real Owner Repair Stories

• Ford Truck Enthusiasts forum user (2005 Ford F-250 V10 (similar fuel system architecture)) — Crank no-start, P1633 code (Keep Alive Power Voltage Too Low), but also symptoms of no fuel.
  ❌ Tried (didn't work) Replacing the in-tank fuel pump., Replacing the Fuel Pump Driver Module.
  ✅ What actually fixed it The ground wire from the FPDM had broken off its connection point on the frame. After cleaning the frame and re-attaching the ground wire securely, the fuel pump activated correctly and the truck started.

OEM Part Supersession History

• AL3Z-9D370-A (example predecessor) → FL1Z-9D370-A — Ford has updated the FPDM multiple times across different platforms to improve reliability and resistance to corrosion.

Model Year Variations Within This Range

• 2012 - Early 2016: Vehicles built on or before April 6, 2016, are covered by TSB 16-0060 for the corroding FPDM. This implies that vehicles built after this date may have received an improved part or mounting design from the factory to mitigate the galvanic corrosion issue.