Ford F-150 2017–2020 — technical service bulletin
Bulletin SSM 48439 · NHTSA communication 10170920 · issued Jan 9, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2017–2020
model years
4
vehicle entries
Official summary
Some 2017-2020 F-150 and 2018-2020 Expedition/Navigator vehicles equipped with a 3.5L EcoBoost engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P04DB stored in the powertrain control module (PCM). The regulatory monitor for DTC P04DB is sensitive to crankcase system pressure concerns such as oil level indicator o-ring seal, incorrectly installed oil level indicator, crankcase hose, vacuum hose disconnects and oil fill cap o-rings. If root cause is unidentified after inspecting for loose or incorrectly installed crankcase pressure system comp
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.