DPF (Diesel Particulate Filter) Facts:

Soot is a product of combustion and is therefore a product of your car engine. It is also bad for the environment if left in the exhaust fumes - that's where a Diesel Particulate Filter comes in handy!

A Diesel Particulate Filter (aka a DPF) is a piece of equipment that is made to remove soot and other diesel particulates from the exhaust fumes of a diesel engine.

However, this does mean that DPF cleaning is necessary

During combustion, a diesel engine produces many different particulates (including soot). These particulates are trapped by the DPF (hence the need for DPF filter cleaning). The DPF then transforms the soot, ash and other particulates during the regeneration process (DPF cleaning) in order to maintain high performance levels. This process happens in two ways:

• Passive regeneration: Occurs automatically during normal driving conditions when the DPF becomes hot enough to burn off some of the trapped particulates (soot). Typical temperatures are 550 degrees celsius or higher.
• Active regeneration: Led by the engine computer unit (ECU) because the temperature is not sufficient to burn of the particles. Typically this happens when the soot build up reaches 45% or more in the DPF. At this point, the ECU initiates a fuel injection to increase the exhaust temperature and therefore burns off some of the excess soot particulates.