DPF = Diesel Particulate Filter. This is a filter that captures and stores the exhaust soot in order to help reduce the emissions of diesel cars. And every so often they have to be burned off as they only have so much storage capacity. This is when your vehicle does a DPF regeneration.

The light on your dash board relating to this is orange exhaust symbol with small circles inside it. When this comes on it means that there is a partial blockage in the filter. Now normally if everything is working fine your car will do the regeneration by itself. This normally happens when they car is at higher speeds for a decent amount of time this is the passive regeneration. (30-50mins)

Active regeneration is when they extra fuel is added automatically to increase the exhaust temperature and burn off the stored soot. You may notice an increase in idle when you are stopped. Problems can occur if this is cut short as the journey was not long enough.

Now the main problem you can have with this system is that it will put your car into limp mode as the DPF is blocked. This can leave you stranded and you will have to have it taken into a shop for a forced regeneration. This should clear out the stored soot and allow your vehicle to operate properly again.

Now this is where our OBD2 scan tools come into the pictures as it can allow you to view the data on your DPF and also do forced regeneration which is something that you would normally have to go to a mechanic to have done.


Our basic OBD-AUS Bluetooth tools will allow you to look at the temperature of the DPF system and see other data which will allow you to work out if it is working correctly. For the DPF apps we suggest using a app like Torque or car scanner elm. For a full dedicated OBD2 DPF app you can use something like: VAG DPF

Now to do Forced DPF regeneration you will need one of our full system scan tools and you will need to contact us first to ensure your year and model is covered.