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Not everyone knows what a DPF (Diesel Particulate Filter) is, but people that have replaced them certainly would because of the big dollars that it cost them to replace. While not all diesel cars have DPFs, they're becoming more common any most diesels made after 2010 will have a DPF. If a DPF becomes block the car will go into limp mode and will lose all of its power and make it near impossible to drive.

At their core, Diesel Particulate Filters (DPF) are a good idea. These cylinder-like, exhaust system devices capture the diesel's harmful soot particles, then periodically burn them off in a high-temperature combustion process called, regeneration.