Diesel Particulate Filter

DPF’s are in all diesel trucks made after 2006.  They were designed to keep exhaust soot from polluting the environment.  They are highly efficient, typically removing 85-100% of the Diesel Particulate Matter (DMP) as it passes through the filter.  However, over time, soot builds up on the filter walls and must be cleaned for the filter to do its job effectively.

To do this it must be burned out of the system.  This regeneration removes the soot as gaseous carbon dioxide.  If the build-up is too great, the DPF may need to be removed and cleaned.  DPF’s are expensive to replace―new ones can cost upwards of $5,000―so it’s important to have them cleaned periodically to avoid excess soot build-up.  

It is recommended that DPF’s are cleaned every 150,000-300,000 miles to remove the ash that has accumulated.  Cleanings usually take as long as an oil change.

DPF’s are a necessity for a clean environment.  The filters remove particulate matter, nitrogen oxides, carbon monoxide, and hydrocarbons, all of which are harmful to humans and animals by causing cancer, damaging lung passages, and harming cardiovascular and nervous systems.

To ensure your DPF is in clean working order, make sure your truck is on a regular preventative maintenance program.