2015 Ford Transit 350 Wagon Owner Manual Printing 3 - Page 127

Fuel and Refueling If your vehicle is not ready for I/M testing, you may need to: • Drive on an expressway or highway for a steady 15 minutes, followed by 20 minutes of stop-and-go driving with at least four 30-second idle periods. • Allow your vehicle to sit for at least eight hours without starting the engine. Then complete the above driving cycle. The engine must warm up to its normal operating temperature. Do not switch the ignition off until the above driving cycle is complete. If your vehicle is still not ready for I/M testing, you will have to repeat the above driving cycle. Diesel Particulate Filter Maintenance Failure to carry out active or operator commanded regeneration when advised could result in a clogged diesel particulate filter. If the diesel particulate filter fills beyond the regeneration threshold, your vehicle will disable the ability for active and operator commanded regeneration. This could result in irreversible damage to the diesel particulate filter requiring replacement that the Ford Warranty may not cover. If your vehicle is not fitted with operator commanded regeneration, check with an authorized dealer for availability. Passive Regeneration During passive regeneration, the exhaust system temperature and constituents automatically clean the diesel particulate filter, or reduce the soot level, by oxidizing the soot. Cleaning occurs naturally during normal engine operating conditions, at varying levels depending on driving conditions. Active Regeneration Once the diesel particulate filter is full of exhaust particles, the engine control module will command the exhaust system to clean the diesel particulate filter through a process called 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 will then be ready to continue trapping exhaust particles. The regeneration process operates more efficiently when you drive your vehicle at a steady speed of 30 mph (48 km/h) or above for approximately 20 minutes to complete the process. The frequency and duration of regeneration will fluctuate by how you drive your vehicle, outside air temperature, and altitude. For most driving, Diesel Exhaust System: Oxidation Catalyst And Diesel Particulate Filter System Your vehicle is fitted with a diesel particulate filter. The diesel particulate filter is an inline filter in the exhaust system that reduces carbon emissions by trapping exhaust particles before they reach the tailpipe. The diesel particulate filter looks similar to a traditional exhaust catalyst, except it is larger, and is part of the exhaust system under the vehicle. The filter couples to a diesel oxidation catalyst that reduces the amount of harmful exhaust emitted from the tailpipe. As soot gathers in the system it begins to restrict the filter. The soot that gathers inside the filter is cleaned in two different ways, passive regeneration and active regeneration. Both methods occur automatically and require no actions from the driver. During either one of these regeneration methods, you may notice a change in exhaust tone. At certain times, the information display will display various messages related to the diesel particulate filter. 124 Transit (TTH) Canada/United States of America, enUSA, Edition date: 03/2014, Third Printing