2020 Ford F-350 SD engine problems
14 owner complaints filed with NHTSA name the engine on the 2020 Ford F-350 SD — 8% of all complaints for this model year.
What owners report
“The contact owns a 2020 FORD F-350. The contact stated while driving at an undisclosed speed, he had a loss of motive power and check engine warning light was illuminated when driving, almost causing an accident due to not being able to accelerate. The vehicle was taken to a dealer where it was…”
filed May 21, 2026
“The component/system that failed or malfunctioned is the SCR (Selective Catalytic Reduction) NOx Catalyst Efficiency system, triggering DTC P20EE – SCR NOx Catalyst Efficiency Below Threshold (Bank 1). This issue began immediately after Ford Recall 24S78 (PCM software update) was performed on April…”
filed May 8, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
This article supersedes TSB 25-2572 to update the Parts List to correct the part number LC3Z-6006-L to LC3Z-6781-A, remove the flex plate bolts AL3Z-6379-BA from the parts list as these bolts are in kit LC3Z-6781-A…
TSB 26-2256 · Service Bulletin/Repair Instructions · issued Jun 19, 2026
Engine problems in other F-350 SD years
| Year | Reports | Share |
|---|---|---|
| 2024 F-350 SD | 3 | 7% |
| 2023 F-350 SD | 3 | 8% |
| 2022 F-350 SD | 9 | 8% |
| 2021 F-350 SD | 14 | 15% |
| 2019 F-350 SD | 17 | 4% |
| 2018 F-350 SD | 7 | 4% |
| 2017 F-350 SD | 22 | 4% |
| 2016 F-350 SD | 22 | 11% |
| 2015 F-350 SD | 37 | 18% |
| 2012 F-350 SD | 3 | 10% |
| 2011 F-350 SD | 9 | 21% |
| 2010 F-350 SD | 7 | 14% |
Other reported problem areas on the 2020 Ford F-350 SD
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.