DPF (Diesel Particulate Filter) is another attempt to burn off carbon from an engine.
Designed to collect carbon on the filter system until the sensor detects blockage, then the vehicle injects fuel at high revs to burn off or clean the filter. DPF filters are not designed for city driving so vehicles that don't "get a good run" have all sorts of problems and usually require a regeneration burn, where the vehicle must get the revs up for about twenty minutes to accomplish a burn.
This is a very problematic system but illegal to remove if fitted to your vehicle.
Here is the good news.
XSNANO fuel additives are designed to remove carbon from engines in the combustion chamber, by creating a more complete burn of fuel. Therefore there is less carbon to "block up" the DPF unit and it will require fewer "Burn offs" and in some cases, it could stop them altogether. So your DPF filter will remain clean, not requiring a regeneration burn and your vehicle will run better and last longer.
Use XSNANO NDA at a ratio of one mil per ten litres of fuel. (1; 10,000)