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Diesel Particulate Filters Explained

WHAT IS IT?

In simple terms, the Diesel Particulate Filter (DPF) is part of the exhaust system responsible for cleaning the engine exhaust gases before they enter the atmosphere.

WHY HAVE A DPF?

In order to meet European emissions legislation, it is necessary to find new ways to filter the exhaust gases and particles before they leave the vehicle exhaust system. The DPF uses advanced technology to perform this task. The exhaust smoke and black soot is reduced, the result is a cleaner environment and less pollution entering the atmosphere.

HOW DOES THE DPF WORK?

In addition to converting the harmful exhaust gases, in the same way as a conventional catalytic converter, the DPF also catches soot particles emitted in the exhaust gas. The DPF continues to collect soot particles until a certain level is reached. At this point the DPF will clean itself through a process known as DPF regeneration. This process increases the temperature within the DPF and burns off the soot particles.

HOW WILL THE DPF AFFECT ME?

In order to carry out the regeneration process the DPF needs to reach and maintain an exhaust temperature higher than its normal operating temperature. Under most conditions the vehicle is able to carry out the regeneration procedure unaided. However, in some circumstances where the required temperature cannot be achieved, i.e. frequent short journeys or stop/start driving, the vehicle may fail to regenerate the DPF. If this situation occurs the DPF warning light will illuminate on the dash.

WHAT SHOULD I DO IF THE DPF WARNING LIGHT COMES ON?

This light could illuminate between 10 and 1,000 miles. When the light shown illuminates, it does not mean there is a fault on the vehicle. It means the vehicle needs help to carry out DPF regeneration. The procedure involves the vehicle being driven in a certain way to help increase the exhaust temperature. Drive continuously for about 10-15 minutes at a speed of at least 40mph in fourth or fifth gear (automatic gearboxes select sport mode), to maintain an engine speed no less than 2,000 rpm.

     
 

IS THERE ANYTHING ELSE I SHOULD KNOW ABOUT DPF?

  • If the DPF needs replacing and the guidelines/recommendations made by Skoda have not been followed, the cost of replacement will not be covered by the manufacturer's warranty.
  • Driving conditions in inner-city and any UK island do not provide optimum conditions for the regeneration procedure.
  • Consider your driving style and length of journey to allow for the driving conditions required for DPF regeneration.
 

 

FOR FURTHER INFORMATION PLEASE CONTACT WESTOVER SKODA.