Diagsheet

2020 Ford F-350 Super Duty · symptom sheet

Diesel fuel system or injector problems

  • 34owner reports
  • 124,000median miles
  • 0involved a crash

Newest report Aug 26, 2026 · checked Sep 19, 2026

34 of the 188 complaints on this car describe diesel fuel system, which makes it the most reported problem on the 2020 F-350 Super Duty.

Tick what matches of 34 reports

31
8

What got replaced

Owners who name the part that was replaced mention the fuel pump (14 reports).

Recalls and investigations

2 recalls on the fuel system, diesel cover the 2020 model year. A recall on the same system isn't always the same failure, so read the defect text.

26V-158Mar 17, 2026
Fuel System, Diesel:Delivery:Fuel Pump

Ford Motor Company (Ford) is recalling certain 2020-2022 F-Super Duty F250, F350, F450, F550, 2021-2022 F600, and 2022 F750 vehicles previously repaired incorrectly under recall number 24V957. Biodiesel deposits may form on the pump drivetrain roller components, which could lead to failure of the high pressure fuel pump.

Risk and remedy
Risk: High pressure fuel pump failure can cause a loss of drive power, increasing the risk of a crash.
Remedy: Dealers will update the powertrain control module (PCM) software, free of charge. Owner notification letters were mailed mailed April 7, 2026. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 26S17. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on March 18, 2026.
24V-957Dec 20, 2024
Fuel System, Diesel:Delivery:Fuel Pump

Ford Motor Company (Ford) is recalling certain 2020-2022 F-Super Duty F250, F350, F450, F550, F600, and 2021-2022 F-650, F750 vehicles. Biodiesel deposits may form on the pump drivetrain roller components, which could lead to failure of the high pressure fuel pump.

Risk and remedy
Risk: High pressure fuel pump failure can cause a loss of drive power, increasing the risk of a crash.
Remedy: Dealers will update the powertrain control module (PCM) and Transmission Control Module (TCM) software, free of charge. Owner notification letters were mailed January 23, 2026. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 24S78.

NHTSA investigations into the fuel system, diesel on the F-350 Super Duty

PE24-014opened May 9, 2024
Fuel System, Diesel · model years 2015 to 2021

Sogefi secondary diesel fuel filter leak. Open.

NHTSA summary
The Office of Defect Investigations (ODI) has received 27 complaints alleging diesel fuel leaks due to a fracture in the secondary fuel filter housing in model year (MY) 2015-2021 Ford Motor Company (Ford) F-250, 350, 450, and 550 Super Duty vehicles equipped with 6.7L diesel engines. Of these complaints, 12 describe an engine compartment fire. The proximity of the secondary fuel filter to high heat sources creates a potential for autoignition thermal events and fires. ODI has contacted the vehicle manufacturer, Ford, and the filter manufacturer, Allevard Sogefi USA (Sogefi), and learned that the low-pressure fuel system is capable of a maximum operating pressure of 8.5 Bar, while the secondary fuel filter is only tested to seven (7) Bar during the manufacturing process. Additionally, changes starting in 2022 by both Ford and Sogefi align with a lack of similar complaints on MY 2022 and newer vehicles. ODI is opening this Preliminary Evaluation (PE) to evaluate the severity of the potential problem and to fully assess the potential safety-related problems. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

When it happens

The middle half of failures fell between 59,000 and 150,000 miles, from the 21 reports that gave a mileage.

224
2425
826

What owners wrote

No report on this problem is short enough to quote in full.

Should you keep driving it?

This page can't tell you that. 0 of 34 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.

File your own report with NHTSA. Complaint counts are how a problem gets an investigation.