All You Need to Know About Diesel Particulate Filters

If you own a diesel car or van, then it’s important to know about diesel particulate filters (DPFs). DPFs are designed to reduce the number of pollutants emitted from diesel cars and vans, making them both more efficient and environmentally friendly. In this blog post, we’ll cover what a DPF is, how it works, how to carry out passive and forced regenerations of your DPF, and more.

What is a DPF? 

A diesel particulate filter is a device that captures and stores exhaust soot to reduce emissions from diesel engines. The purpose of a DPF is to trap particles from the engine's exhaust before they can be released into the atmosphere. This reduces the number of pollutants that are emitted from the vehicle, making it cleaner and more efficient.

How Does A DPF Work?  

A DPF works by trapping soot particles in an internal filter element as they pass through the exhaust system. The filter element is made up of hundreds of small cells which are coated with a special material that absorbs soot particles like a sponge. As these particles build up over time, they eventually need to be removed for the engine to continue running properly. This process is known as regeneration.  

How Does a Diesel Particulate Filter Regenerate Itself?  

There are two types of regeneration processes – passive regeneration and forced regeneration – which will be discussed later in this post. In both cases, regeneration involves burning off the soot that has been trapped in the filter element using high temperatures created by your engine's exhaust gas.

Once all the trapped soot has been burned off, your filter will be clean again and ready for use once more.   

How To Carry Out A Passive Regeneration Of My Diesel Particulate Filter?  

Passive regeneration occurs when conditions are right for your vehicle's exhaust temperature to reach high enough levels on its own without any additional help from you or your vehicle's computer system. This usually happens when you're driving on highways or other long stretches of road where your engine can run at higher RPMs for extended periods of time without having to stop or slow down much.  

How To Carry Out A Forced Regeneration Of My Diesel Particulate Filter?  

Forced regenerations should only be attempted by an experienced professional with professional-level diagnostic tools.

Forced regeneration occurs when your vehicle's computer system detects that there is too much soot build-up in the filter element and needs to be manually triggered by you or via an external tool such as an OBD-II scanner connected to your vehicle's computer system in order for it to burn off all of the excess soot trapped inside it.

During this process, your vehicle will run at higher RPMs than normal while also injecting fuel into the exhaust stream in order to create hotter temperatures which will help burn off all of the trapped soot particles faster than would normally happen during passive regeneration cycles alone.

Diesel Particulate Filters commonly referred to as DPF's

Diesel particulate filters (DPFs) are essential components of modern diesel cars and vans because they help reduce harmful emissions while improving efficiency at the same time. Knowing how these devices work – including how to carry out passive and forced regenerations – can go a long way toward ensuring that your diesel car or van continues running smoothly for years to come!

Understanding how DPFs work can also mean fewer trips to mechanics who may charge large sums for repair work related to faulty filters or improper regenerations! With these tips in mind, you should now have all you need to know about managing your diesel particulate filter efficiently!

IMI Certified Tuning Specialist

MPG Tuning Ltd
Unit 44 Rumerhill Business Estate
Cannock, Staffordshire, WS11 0ET

 Tel: 01543 466662


MPG Tuning Offer Professional ECU Remap and Tuning services including but not limited to ECU Remapping, EGR Delete, DPF Solutions, VAG Emissions Recall Scandal Rollback, Tricore Processor Programming, Boot Mode, and Traditional Chip Tuning.

MPG Tuning is based in Cannock Staffordshire but serves customers from further afield typically from the following areas, Lichfield, Burntwood, Rugeley, Stafford, Brownhills, Walsall, Wolverhampton, Birmingham, Tamworth plus many more areas throughout the West and East Midlands.

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I went for a remap on my T5 as it had an awful flat spot around 2800 rev's I got great personal service and its like having a new engine in the van smooth power and greater economy.... Highly recommended wish I'd done it months ago it would have paid for it self already thanks a lot hills are no longer a drag.

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My boyfriend has exactly the same car as me 1.5 diesel fiesta, had his remapped and was over the moon with it. I had never thought of having a car remap but after driving his, mine felt heavy and slow so decided to get mine done too, now I am converted I love it even more and I am getting about 80-90 miles per tank better than before, very happy , great friendly service and awesome cuppa while we waited

Kelly Williams

Had my renault van remapped at mpg tuning, awesome power, can now keep up with pigeons, thanks Mike for an excellent job 👍👍



Our lead technician has over 16 years’ experience in the tuning industry and long term connections with some of the Worlds most experienced data programming and tuning specialists. We are extremely passionate about our customer satisfaction and strive for a perfect result every time.

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