2021 Ford F-350 Super Duty: Diesel complaints
Owner-reported issue (NHTSA complaints, not a recall)
Symptoms
NHTSA has 24 owner complaints for the 2021 Ford F-350 Super Duty that list the diesel component. Complaints are individual owner reports, not verified defects.
Examples:
- NHTSA complaint ODI #11723788 (filed 03/12/2026): “The contact owns a 2021 ford f-350. the contact received notification of nhtsa campaign number: 24v957000 (fuel system, diesel). the contact recently set an appointment with a local dealer for the software update, but was informed by the dealer that the recall had been placed on hold. the contact st…”
- NHTSA complaint ODI #11720003 (filed 02/23/2026): “The contact owns a 2021 ford f-350. the contact stated that while driving approximately 65 mph, the vehicle lost automotive power. the low power mode warning light was illuminated. the contact received notification of nhtsa campaign number: 24v957000 (fuel system, diesel); however, the part to do th…”
- NHTSA complaint ODI #11704259 (filed 12/10/2025): “The contact owns a 2021 ford f-350. the contact received a recall letter related to nhtsa campaign number: 24v957000 (fuel system, diesel). the contact was concerned about being involved in a crash. the local dealer was contacted and confirmed that the software fix was not available. the vehicle was…”
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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