A diesel particulate filter (DPF) is a filtration device installed in a diesel vehicle's exhaust system to trap particulate matter such as soot and ash, which are present in diesel . A diesel particulate filter (DPF) is a filter fitted to cars and it is made to capture and store exhaust soot. The soot is a naturally occurring part of the combustion process, but larger pieces can be dangerous for an engine, so the filter removes this risk.

what is a diesel particulate filter