2020 Ford F-350 SD fuel/propulsion system problems
12 owner complaints filed with NHTSA name the fuel/propulsion system on the 2020 Ford F-350 SD — 6% of all complaints for this model year.
What owners report
“1. High Pressure Fuel Pump 2. All safety is good 3. It has been taken to the dealership and blaming it on the water separator (water/rust in fuel) The codes thrown are towards the High Pressure Fuel Pump 4. No there were no warning lights or messages prior to the failure. 5. Dealership did not…”
filed Jul 28, 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.
Fuel/propulsion System problems in other F-350 SD years
| Year | Reports | Share |
|---|---|---|
| 2023 F-350 SD | 2 | 5% |
| 2022 F-350 SD | 6 | 6% |
| 2021 F-350 SD | 12 | 13% |
| 2019 F-350 SD | 13 | 3% |
| 2018 F-350 SD | 4 | 2% |
| 2017 F-350 SD | 23 | 4% |
| 2016 F-350 SD | 16 | 8% |
| 2015 F-350 SD | 22 | 11% |
| 2012 F-350 SD | 1 | 3% |
| 2011 F-350 SD | 4 | 9% |
| 2010 F-350 SD | 1 | 2% |
| 2008 F-350 SD | 2 | 2% |
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.