DPF is an abbreviation of Diesel Particulate Filter, sometimes referred to as an FAP – Filtre à parlicules on French vehicles. The DPF or FAP forms part of the exhaust system on some diesel vehicles that traps soot and particulate matter in order to prevent it being omitted from the vehicle exhaust into the atmosphere.
The DPF was fitted to a percentage to of vehicles from around 2002 and became pretty much standard equipment from 2008 onwards.
Over time the soot load of the filter accumulates and it is then that regeneration is required. The soot load is calculated by the engine ECU by monitoring pre DPF and post DPF exhaust pressure by means of a pressure differential sensor. When the pre DPF pressure is a predetermined amount higher than the post pressure, regeneration should take place.
The upside to the DPF is cleaner emissions. The downside is reduced engine power and higher fuel consumption.
There are several different methods of regeneration. Extra heat is required in order to burn off the soot and particulate matter.
Passive regeneration is a natural process that normally takes place under certain conditions like on the motorway when the engine is maintaining speed, under reasonable load and at full working temperature. This helps keep the soot level low but generally isn’t enough. This is why other methods of regeneration are required as well.
DPF faults are becoming increasingly more common. There are several common causes -
At Blue Flash Tuning we have the equipment and expertise to diagnose DPF faults on most vehicles. We will always advise the customer of all of the options available allowing the customer to choose the most cost-effective solution.
The DPF is quite an expensive part to replace but fortunately there are several options to consider before replacement -
Please Contact Us with any questions you may have. We are happy to advise and assist where possible.