2021 Ford F-350 Super Duty: Fuel/Propulsion System complaints
Owner-reported issue (NHTSA complaints, not a recall)
Symptoms
NHTSA has 15 owner complaints for the 2021 Ford F-350 Super Duty that list the fuel/propulsion system component. Complaints are individual owner reports, not verified defects.
Examples:
- NHTSA complaint ODI #11735094 (filed 05/01/2026): “Vehicle safety complaint – 2021 ford f-350 i am submitting this complaint regarding a safety-related failure involving my 2021 ford f-350. while driving under normal conditions, the vehicle suddenly entered “limp mode,” resulting in a significant and immediate loss of power. approximately 20 miles l…”
- NHTSA complaint ODI #11729913 (filed 04/08/2026): “Repair remedy has not been addressed. leaving the vehicle owners footing the bill when a fuel system problem arises. it's been since 2024 and fmc has not done anything about it. dec 20,2024 manufacturer recall number24s78 nhtsa recall number24v957 recall statusrecall incomplete, remedy not yet avai…”
- NHTSA complaint ODI #11718342 (filed 02/16/2026): “Driving and abrupt transmission shifting issues.…”
Likely causes
These complaints do not establish a single root cause; read the examples above and get a diagnosis.
Fix, in plain English
No single fix is established by these reports. Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer about technical service bulletins (TSBs) or extended warranty coverage, then have the system diagnosed.
DIY difficulty: Varies
Depends on the specific failure; get a diagnosis first. (Our assessment.)
Cost
No sourced cost range for this issue. Get a written quote after diagnosis.
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