The Diesel Particulate Filter is an exhaust device that traps particulate matter such as diesel exhaust gases and solid soot particles. These filters are strictly only found on diesel vehicles only. The particulate filter requires regular cleaning which is referred to as regen cycle. During the regeneration cycle burns off diesel soot at a high temperature resulting in ash. After the regen, cycle is complete the filter can be begin collecting exhaust gases again. If the filter is unable to clean itself, it can cause costly repairs. It is important to keep that filter clean for it to its job. There are three types of regenerations. The passive regeneration, active regeneration, and forced regeneration. Most newer diesel vehicles are equipped with multiple sensors that monitor the efficiency of the vehicle's engine. When the system recognizes performance issues the orange warning symbols on your dashboard will light up. Call us today if you have any questions regarding your diesel vehicle; we do work on diesels!