Some 2018-2019 F-150 vehicles equipped with a 3.5L EcoBoost or 2.7L EcoBoost engine and some 2018-2019 Expedition and Navigator vehicles equipped with a 3.5L EcoBoost engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P04F0 and/or P144C stored in the powertrain control module (PCM). This may be due to loose or partially connected evaporative emissions (EVAP) vapor lines. Before completing the Powertrain Control/Emissions Diagnosis (PC/ED) Manual pinpoint test (PPT) HX follow the Service Procedure.
