A car's filters must all be regularly cleared in order to reduce its environmental effect and improve driving performance. Diesel Particulate Filter, or just DPF Cleaning Park Royal, operates in a similar manner. Diesel Particulate Filter (DPF) regeneration is the process of cleaning or emptying a DPF, which is a device that collects exhaust soot to reduce emissions from diesel vehicles. Additionally, a defective DPF can cause you to fail the MOT test.