2021 Ford F-250 Super Duty · symptom sheet
Diesel fuel system or injector problems
- 25owner reports
- 100,000median miles
- 0involved a crash
Newest report Jul 21, 2026 · checked Oct 2, 2026
25 of the 165 complaints on this car describe diesel fuel system, which makes it the most reported problem on the 2021 F-250 Super Duty.
Tick what matches of 25 reports
Diesel fuel system on other F-250 Super Duty years
Report counts are for each model year on its own, so a newer car has had less time to collect them. Model years with too few reports of it for a sheet: 2014, 2015, 2016, 2017, 2018, 2019, 2022.
What this problem usually is
Diesel fuel system complaints have a pattern of their own. Many are waiting on a recall part that isn't available yet. Others describe the truck stalling or losing power, a fuel smell in the cab, trouble right after refueling, or a diesel particulate filter that keeps clogging. Injector replacement comes up often.
What got replaced
Owners who name the part that was replaced mention the fuel injector (4 reports) and the fuel pump (4 reports).
Recalls and investigations
3 recalls on the fuel system cover the 2021 model year. A recall on the same system isn't always the same failure, so read the defect text.
Biodiesel deposits may form on the pump drivetrain roller components, which could lead to failure of the high pressure fuel pump.
Biodiesel deposits may form on the pump drivetrain roller components, which could lead to failure of the high pressure fuel pump.
A small void may be present in the top-center of the vehicle's underhood secondary fuel filter cap, which may progress to a pinhole over time, allowing fuel to leak from the top of the secondary fuel filter.
All 13 recalls on the 2021 Ford F-250 Super Duty, with the owner complaints on each recalled system
NHTSA investigations into the fuel system on the F-250 Super Duty
Sogefi secondary diesel fuel filter leak. Open.
When it happens
The middle half of failures fell between 56,000 and 124,000 miles, from the 15 reports that gave a mileage.
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 25 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. How reports land on this sheet.
Guide Paid for this repair before a recall covered it? How recall reimbursement works