The warning symbol also shows that passive regeneration didn’t work. This process automatically burns off carbon soot particles. However, it only happens when the exhaust temperature is very warm for a long time. Passive regeneration is unlikely if you make frequent, short trips rather than long drives.
Active regeneration increases the temperature in the DPF to turn the particles into gas which can be expelled. [3] X Research source These speeds are general guidelines. Check your vehicle handbook to find the best practice for your vehicle.
Active regeneration typically takes 5 - 25 minutes, depending on the make and model of your vehicle. Active regeneration needs fuel to work, so make sure that you have at least 5. 3 US gal (20 L) of fuel in the tank. This is around 1/4 full. [5] X Research source
DPF cleaning additives contain fuel borne catalysts. These experience a combustion process to eliminate the soot and ash. [7] X Research source Use the cleaning additive every 3 - 6 months to maintain the DPF. Check the vehicle handbook to see how often you should use an additive for your particular vehicle.
Take your car to a mechanic to get the DPF professionally cleaned if the warning light doesn’t go away, as the filter will need to be removed for cleaning.
The mechanic will clean the DPF using forced regeneration. This can be an expensive procedure, however, it’s cheaper than replacing the DPF. [11] X Research source
The only time that a DPF can be removed is for repair work by a qualified mechanic. Never attempt to remove the DPF to repair it yourself, as this requires extensive, expert knowledge and equipment.
