P0627 on 2012-2016 Ford F-350 SD: Fuel Pump Control Circuit Causes and Fixes

What's Unique About the 2012-2016 Ford F-350 SD

On the 2012-2016 Super Duty with the 6.2L or 6.8L gas engines, this code is specifically addressed by a manufacturer TSB. The issue is so common that Ford recognized a pattern of failure in the Fuel Pump Driver Module (FPDM) for trucks built on or before April 6, 2016. Unlike older Fords where the FPDM's aluminum body would corrode through, this generation's issue is more often an internal electronic failure of the module or a problem with its wiring connector, leading to a loss of communication and fuel delivery.

Diagnostic Flowchart

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

Symptoms You May Notice

• Engine cranks but will not start.
• Engine stalls immediately after starting or while driving.
• Sudden loss of engine power while driving.
• Engine hesitation or stumbling under acceleration.
• Illuminated Check Engine Light.
• Whining noise from the fuel tank area may be noticeable before failure.

Most Likely Causes

1. Faulty Fuel Pump Driver Module (FPDM) 🔴 High Probability This is a known issue acknowledged by Ford in TSB 16-0060 for vehicles built on or before 4/6/2016. The module itself can fail internally due to electronic component breakdown.
   How to confirm: After checking the fuse and relay, this is the most likely culprit. Diagnosis involves checking for power and ground at the module and verifying the command signal from the PCM. Often, replacement is the quickest diagnostic step, especially if codes like U0109 are also present. A user with a 2015 F-150 confirmed a bad module was the cause after verifying power was going into the module but not out to the pump.
   Typical fix: Replace the Fuel Pump Driver Module. The module is located on the passenger side frame rail, often above the spare tire. Dropping the spare tire makes access much easier. It is typically held on by two bolts. 🎬 Watch: Step-by-step walkthrough for replacing the fuel pump control module.
   Est. part cost: $65-$150
2. Blown Fuel Pump Fuse or Melted Fuse Slot 🟡 Medium Probability An electrical short or a failing FPDM/fuel pump can draw excess current and blow the fuse. On related Ford trucks (like the F-150), the fuse slot itself (often #27) is known to overheat and melt, causing an open circuit even if the fuse isn't blown. This is a known issue covered by TSB 15-0137 for the F-150 platform.
   How to confirm: Locate the fuel pump fuse in the under-hood fuse box. For a 2014 F-350, this is typically fuse #66 (20A). Visually inspect the fuse. Crucially, also inspect the plastic around the fuse slot for any signs of melting, browning, or deformation.
   Typical fix: Replace the blown fuse. If the fuse slot is melted, a fuse relocation kit (like the one for TSB 15-0137) must be installed to move the circuit to a more robust, unused slot in the fuse box. If a new fuse blows immediately, a short circuit exists that requires diagnosis.
   Est. part cost: $1-$5 for a fuse, $20-$40 for a relocation kit.
3. Damaged Wiring or Corroded Connector 🟡 Medium Probability The FPDM is located on the frame rail, exposing its wiring harness to road debris, moisture, and winter salt, which can lead to corrosion on the connector pins or physical damage to the wires.
   How to confirm: Visually inspect the wiring harness and connector going to the FPDM. Look for green/white corrosion, bent pins, or chafed/broken wires. Unplugging and replugging the connector can sometimes temporarily restore the connection, confirming a poor contact. A broken ground wire at the frame for the driver module has also been reported as a cause.
   Typical fix: Clean the connector terminals with electrical contact cleaner and a small brush. Apply dielectric grease before reconnecting to prevent future moisture intrusion. If pins are bent or broken, or the connector housing is damaged, the connector pigtail must be replaced. Common aftermarket pigtails include Dorman 645-909 and Standard Motor Products S-1854.
   Est. part cost: $15-$45 for a new pigtail connector.

Rare But Worth Checking

• Failing In-Tank Fuel Pump: While less common than the FPDM for this specific code, a failing fuel pump can sometimes cause an open circuit code if its internal motor windings fail or it shorts internally, blowing the fuse or damaging the FPDM.
• Faulty Fuel Pump Relay: The relay that powers the FPDM circuit can fail. For a 2014 F-350, this is relay #57 in the underhood fuse box. 🎬 Watch: Troubleshooting fuel pump relay and communication codes on Super Duty trucks. A simple diagnostic step is to swap the fuel pump relay with an identical one from a non-critical circuit (like the windshield wipers) to see if the problem is resolved.
• Powertrain Control Module (PCM) Failure: This is the least likely cause. The PCM should only be suspected after all other possibilities, including wiring, fuses, the relay, and the FPDM, have been thoroughly ruled out.

Diagnosis Steps

1. Read all diagnostic trouble codes (DTCs) with an OBD-II scanner. Note if P0627 is accompanied by U0109, P025A, or P00C6, as this strongly suggests an FPDM or circuit issue.
2. Check the fuel pump fuse in the under-hood fuse box (Fuse #66, 20A for 2014 models). Inspect the fuse and its slot for signs of overheating or melting.
3. Swap the fuel pump relay (Relay #57 for 2014 models) with a known good, identical relay from another circuit (e.g., wipers) and see if the truck starts.
4. Locate the Fuel Pump Driver Module (FPDM) on the passenger-side frame rail, typically above the spare tire. Lower the spare tire for easier access.
5. Disconnect the electrical connector from the FPDM. Inspect both the harness side and the module side for corrosion, dirt, or bent pins. Clean with electrical contact cleaner if necessary.
6. If the connector is clean and the fuse/relay are good, the most probable cause is a failed FPDM, especially on trucks matching the TSB 16-0060 criteria.
7. For advanced diagnosis: Use a multimeter to check for 12V power and a good ground at the FPDM connector. A wiring diagram is needed to identify the correct pins. Check for battery voltage at the power input wire and verify the integrity of the dedicated ground wire.
8. If power and ground are good, replace the FPDM. This is the most common fix. After replacement, clear the codes and test drive.
9. If the problem persists after replacing the FPDM, the wiring between the PCM and FPDM, or the in-tank fuel pump itself, may be at fault and requires further testing.

Parts You'll Likely Need

• Fuel Pump Driver Module (FPDM) (OEM #6C2Z-9D372-A (supersedes 4C2Z-9D372-BA, 6L1Z-9D372-AD)) — This is the most common failure part for code P0627 on these trucks, as documented in Ford TSB 16-0060.
  Trusted brands: Motorcraft, Dorman, Standard Motor Products (SMP) 🎬 See: Choosing a more reliable replacement fuel pump driver module.
  OEM price range: $100-$150
  Aftermarket price range: $65-$100
• FPDM Connector Pigtail (OEM #Motorcraft WPT-1061 (check application)) — Needed if the original connector is corroded, melted, or has broken wires/pins, preventing a solid connection to the new FPDM.
  Trusted brands: Dorman 645-909, Standard Motor Products S-1854
  OEM price range: $30-$50
  Aftermarket price range: $15-$45

Related Codes That Often Appear With This One

• U0109 — Stands for "Lost Communication With Fuel Pump Control Module". This code directly points to a failure in the FPDM or its wiring, as the PCM can no longer communicate with it. It is frequently seen with P0627.
• P025A — Stands for "Fuel Pump Module 'A' Control Circuit/Open". This is a very similar code to P0627 and is often triggered simultaneously for the same root causes.
• P00C6 — Stands for "Fuel Rail Pressure Too Low - Engine Cranking". This code is a direct symptom of P0627, as the open control circuit prevents the fuel pump from building pressure.
• P025B — Stands for "Fuel Pump Module 'A' Control Circuit Range/Performance". This indicates the control signal is present but outside of its expected operating range, often pointing to the same FPDM or wiring issues.

Technical Service Bulletins (TSBs) & Recalls

• 16-0060: 6.2L/6.8L - Illuminated MIL with diagnostic trouble codes (DTCs) P0627, P025B, P025A, and/or U0109 - Built on or before 04/06/2016.

Platform-Specific Known Issues

• Ford Technical Service Bulletin (TSB) 16-0060 addresses an illuminated Malfunction Indicator Lamp (MIL) with DTCs P0627, P025A, P025B, and/or U0109 on Super Duty trucks with 6.2L or 6.8L engines built on or before April 6, 2016. The bulletin points to a faulty Fuel Pump Driver Module as the cause.

Mechanic-Grade Diagnostic Values

• FPDM Power Input Wire Voltage (Key On) — expected: Battery Voltage (approx. 12V). Failure: 0V or significantly low voltage indicates a problem with the fuse, relay, or wiring from the fuse box.
• FPDM Power Output to Fuel Pump (Key On) — expected: Battery Voltage. Failure: 0V when power input is present suggests a failed FPDM.
• PCM Command Signal to FPDM (PWM) — expected: A duty-cycled signal. The PCM sends a 75% duty cycle to command the pump OFF and begins PWM at 15% duty cycle to turn the pump on.. Failure: No signal or a flat-line voltage indicates a PCM or wiring issue between the PCM and FPDM. This requires an oscilloscope or advanced scan tool to measure.
• Maximum Fuel Pump Pressure (Forced Operation) — expected: At least 70 PSI. Failure: Pressure below 70 PSI when the pump is forced to full output indicates a weak or failing in-tank fuel pump.

Scan Tool Commands That Help

• Ford IDS (or equivalent professional scanner like FORScan): Fuel Pump Commanded Duty Cycle (FP_CMD) — To verify if the PCM is sending the correct command signal to the FPDM. If the PID shows a valid duty cycle (e.g., 15-50%) while cranking but the pump doesn't run, it points towards the FPDM or the pump itself, not the PCM.
• Ford IDS (or equivalent professional scanner): FPCM Activation Test / Output State Control — This is a bidirectional test that allows the technician to directly command the fuel pump on and off through the scan tool. If the pump activates with the scan tool but not during a normal key cycle, it can help isolate software, security, or PCM command issues.

Wiring & Ground Locations

• FPDM Connector (C4336 on some models) — On the Fuel Pump Driver Module, located on the passenger-side frame rail, often above the spare tire.. This is the central connection point. Corrosion, pushed-out pins, or damage here directly causes an open circuit (P0627) or loss of communication (U0109).
• FPDM Ground — The FPDM has a dedicated ground wire that attaches to the frame near the module itself.. A corroded or broken ground connection for the FPDM will prevent it from operating, mimicking a failed module and setting a P0627 code. One owner reported a broken ground wire at the frame was the root cause.
• FPDM Connector Pin 5 (White wire on some schematics) — At the FPDM connector.. This pin should have battery voltage with the key on, as it's the main power feed from the fuel pump relay. No voltage here points the diagnosis upstream to the relay or fuse.
• FPDM Connector Pin 3 (Black/Yellow wire on some schematics) — At the FPDM connector.. This is the dedicated ground pin for the module. Verifying continuity to a clean chassis ground from this pin is critical.

Real Owner Repair Stories

• Ford F150 Forum user (2015 F-150 2.7L EcoBoost (similar fuel system architecture)) — Truck died while driving, crank-no-start, codes P0627 and P00C6.
  ❌ Tried (didn't work) Checked fuel pump fuse (#56) - OK., Checked fuel pump relay - OK., Replaced the Fuel Pump Driver Module (FPDM) after confirming it had power in but not out.
  ✅ What actually fixed it The in-tank fuel pump itself had failed. The user noted that on their truck, dropping the tank was easier than removing the bed for access.
• Ford Truck Enthusiasts Forum user (2005 F-250 V10 (similar fuel system architecture)) — Crank-no-start, pump not activating with key.
  ❌ Tried (didn't work) Replaced in-tank fuel pump., Tested new pump and verified it worked when directly powered.
  ✅ What actually fixed it The ground wire for the Fuel Pump Driver Module was broken off at the frame connection point. Re-establishing a solid ground for the module resolved the no-start condition.

When the Usual Fixes Don't Work

• While the TSB and high failure rate strongly point to the Fuel Pump Driver Module (FPDM) as the primary cause for P0627, it is not the only possibility. In one documented case on a similar Ford truck, an owner replaced the FPDM after confirming it had power in but no power out, yet the problem persisted. The ultimate cause was a failed in-tank fuel pump. This serves as a critical reminder that while the FPDM is the most *likely* culprit, it's not guaranteed. If a new FPDM doesn't solve the issue, the next step should be to test the in-tank pump itself.

OEM Part Supersession History

• 4C2Z-9D372-BA → 6C2Z-9D372-A — Part revision and update by manufacturer. Later parts may have improved internal electronics or weather sealing.
• 6L1Z-9D372-AD → 6C2Z-9D372-A — Part consolidation and revision by manufacturer.
• 4C2A-9D372-BA, BB, BC, BD, CA → Multiple revisions leading up to current OEM numbers. — Progressive updates to the part design over many model years.
  Heads up: These are older numbers often seen on aftermarket cross-reference lists.