A Diesel Particulate Filter (DPF)

Is a Filter on the exhaust system which collects carbon soot and ash from your engine. It stores it in a chamber to help lower Emissions. It then performs a DPF Regeneration, Of which the chamber reaches a high temperature which burns off excessive carbon and soot, there are many things that can cause this to fail or not to regenerate.

 What we Do

  • Our service consist of finding the fault by running a full diagnostic both using a diagnostic tool and also manually checking areas of the DPF system.
  • If all of the DPF components and engine components are working fully and the DPF is cleaned there should be no problems once we have finished the clean
  • The clean is only done when we are happy that the DPF will work once it is clean.

What Causes DPFs To Block or Fail?

We always get asked this question, so here’s a few things that are common causes.

•Component Failure Such As Glow-Plug Or EGR Valves.

On some vehicles having a fault such as faulty Glow-Plugs won’t always show up on your dashboard as a fault. The engine management warning light sometimes does not come on as the fault priority isn’t high enough, the engine will still perform as it should. EGR Valves are also very common due to the soot clogging the valve so that less exhaust gasses passes through, this will cause the DPF not to Regenerate correctly which in time will cause the DPF to block, clog and later lead to a failure. Most of these egr faults can be repaired using our intake clean.

•Poor Fuel Qualities.

Poor fuel quality will not burn as clean and produce more carbon & soot, causing the dpf to block, clog and later lead to failure.

Always use premium branded fuels, supermarket fuels are usually low quality, you really get what you pay for with fuel.

Also most people don’t know but a lot of cars will not attempt to regenerate if the fuel level is below a quater of a tank… keep your tanks topped up guys!

•Poor Maintenance & Servicing.

Poor maintenance and servicing of your vehicles engine has a big part to play in DPF failures. If you engine hasn’t been serviced or serviced using the incorrect oils then you could be at risk. Using the incorrect engine oil can cause the DPF to block, clog and later lead to a failure, also poor servicing can lead to engine or turbo failure. Always use manufacture spec oils and filters this will help keep the ash / carbon & soot levels minimal, always check your fluid levels, this will help the engine stay cool and healthy.

•Short Distance Journeys.

Short distance journeys will not produce the heat needed to regenerate the DPF, a DPF regeneration can take up to 40 minutes to complete a successful regeneration so having a lot of short journeys your dpf may not reach the heat required to burn the soot and carbon away which overtime will block or clog.