Manual - This type of regeneration occurs only when the vehicle is stationary, and it requires action on the part of the vehicle operator.Neither active generation or passive regeneration require input from the vehicle operator, and no check engine light codes are shown the vehicle dashboards for either regeneration process. During active regeneration, raw fuel is injected into the diesel oxidation catalyst (DOC) to achieve appropriate regeneration temperatures in the DPF. Active - If the duty cycle does not produce high enough exhaust temperatures, the DPF becomes loaded with soot, which is indicated by its pressure sensors.Passive - This occurs when the load and speed of the engine produce temperatures greater than 350 degrees C, and it burns off the trapped soot as the vehicle operates.When it comes to diesel particulate filter (DPF) regeneration, there are three types:
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