Control your diesel engine condition by monitoring DPF diesel particulate filter clog level and regenerations history. Easily check if the filter is currently in the regeneration process. In modern diesel engines any car faults are impacting DPF filter condition. Faulty injectors, cylinder compression issues, blow-by circuit problems, engine seals worn and many others. Controlling DPF state gives the best overview of the car condition and performance. It is great tool when you are buying used