2018-F150-Owner's Manual

Engine Emission Control

Passive Regeneration In passive regeneration, the exhaust system temperature and constituents automatically clean the filter by oxidizing the soot. Cleaning automatically occurs during normal vehicle operating conditions due to driving patterns. Active Regeneration Once the diesel particulate filter is full of exhaust particles, the engine control module commands the exhaust systemto clean the filter through active regeneration. Active regeneration requires the engine computer to raise the exhaust temperature to eliminate the particles. During cleaning, the particles convert to harmless gasses. Once cleaned the diesel particulate filter continues trapping exhaust particles. The regeneration process operates more efficiently when you drive your vehicle at a constant speed above 30 mph (48 km/h) and at a steady engine speed for approximately 20 minutes. The frequency and duration of regeneration fluctuates by how you drive your vehicle, outside air temperature and altitude. For most driving, regeneration frequency varies from100–500mi (160–805 km) between occurrences and each occurrence lasts 9–35 minutes. You can usually reduce the duration of regeneration if you maintain a constant speed above 30mph (48 km/h). When the engine control module detects that the diesel particulate filter is nearly full of particulates and you are not operating your vehicle in amanner to allow effective automatic regeneration, messages appear in the information display as a reminder for you to drive your vehicle in order to clean the diesel particulate filter. If you drive your vehicle in a manner to allow effective automatic regeneration, the information display

shows a cleaning exhaust filter message, which is the normal regeneration process. You canalso chooseoperator commanded regeneration to clean the exhaust system at this point. See InformationMessages (page 123). If you are not able to drive in amanner that allows effective automatic active regeneration or you choose to perform regeneration of the diesel particulate filter while at idle, then operator commanded regeneration would need to be performed. Operator Commanded Regeneration (If Equipped) If your vehicle is operated with significant stationary operation, low speed drive cycles less than 25 mph (40 km/h), short drive cycles, a drive time is less than 10 - 15 minutes or the vehicle does not fully warm up, passive and active regeneration may not sufficiently clean the diesel particulate filter system. Operator commanded regeneration allows you to manually start regeneration of the diesel particulate filter at idle to clean the filter. If you are not surewhether your vehicle has this feature, contact an authorized dealer. WhentoCarryOutOperatorCommanded Regeneration You can use the operator commanded regeneration feature when a message appears in the information display and you are not able to drive in a manner that allows effective automatic active regeneration or if you choose to manually start the regeneration of the diesel particulate filtermanuallywhile the vehicle is idle. See InformationMessages (page 123).

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F-150(TFC)Canada/UnitedStatesofAmerica,enUSA,Editiondate:201709,SecondPrinting