What Is A DPF

The DPF or Diesel Particulate Filter is a specific filter located in a section of your exhaust system, fitted in most modern diesel vehicles.

The purpose of the DPF is to significantly reduce the amount of polluting particles in exhaust fumes, released into the atmosphere.

The captured pollutants, soot and ash should be burned up by passive DPF regeneration, during normal driving, however, to trigger regeneration the DPF must reach a high enough temperature over a long enough period of time.

For drivers doing higher mileage and longer journeys, the passive DPF regeneration normally keeps the DPF clear; however, drivers doing shorter journeys and overall lower mileage often suffer from DPF blockages.

DPF Equipped Vehicles Require Extra Care

If you drive a modern diesel vehicle that incorporates a DPF (diesel particulate filter) you need to be aware that short journeys on a regular basis, may result in DPF associated problems.

In some cases the owner’s manual will provide you with details on how to force regeneration of the DPF – in many cases, this will clear the DPF of accumulated particulates.

Remapping vehicles with diesel particulate filters is possible if certain technical restrictions are observed, and the driver is aware that vehicles with diesel particulate filters require more attention than vehicles without them.

Vehicles Fitted with Diesel Particulate Filters

Eventually, most DPF filters will become blocked due to poor regeneration and manufacturers estimated life is often well overstated. Diesel particulate filters that no longer tolerate regeneration have to be replaced, which can be an expensive requirement.

Whilst the vehicle is under warranty this is not always an issue, but for people that have DPF failures not covered by warranty, the cost of replacement can be uneconomical.

DPF Removal | DPF Delete | Legal Situation

February 2014 new legislation made DPF removal illegal for vehicles used on the public highways, government guidelines set out in 2014 specify that all vehicles that have been previously fitted with a DPF should not have the device removed or bypassed.

Today DPF delete or removal is for off-road use only.

DPF Removal | MOT

The absence of a DPF on a vehicle originally fitted with one is an automatic MOT failure.

During an MOT, your vehicle will be visually inspected for the presence of a DPF, should the examiner noticed that the DPF is missing or has been bypassed they are required to fail the vehicle in question.

If your vehicle will be used off-road only, or if it is intended to be exported, DPF removal or a DPF Delete is a viable possibility.

DPF Removal Benefits
  • Improve vehicle performance, power and fuel economy.
  • Eliminate the need for an expensive DPF replacement.
DPF Forced Regen

If your DPF is partially blocked and causing performance issues, limp mode, and engine management lights but is not responding to passive regeneration by driving at a specified RPM level and distance.

Under these circumstances, a forced regeneration might be a viable option, which is carried out using a diagnostic tool function.

DPF Forced Regen Benefits
  • Lower cost option
DPF Forced Regen Disadvantages
  • Not always successful if DPF is significantly blocked.
  • Only partially clears blockage.
  • May require repeated regen in a short space of time.
  • May also require an oil filter and change.
DPF Clean | Professional DPF Refurbish

Not to be confused with cheap alternatives that simply remove and jet wash the dpf filter, it might appear to be a cheap solution but it’s not when it has to be done again a few weeks later because the filter hasn’t been effectively cleaned out.

Solidified DPF Deposits

Professional Cleaning involves injecting highly effective chemicals designed to dissolve solidified exhaust deposits, which are then flushed out leaving you with an as new DPF filter.

DPF blocked by Ash Deposits

Once a DPF filter has reached the stage where ash build up is blocking the filter, it is normally end of life for the DPF and results in an expensive DPF replacement.

We can now offer a cleaning solution for this eventuality, however, it is not an onsite job so will involve being without your car for 2-3 days normally, but will save you the cost of a DPF replacement.

Having your DPF cleaned professionally by one of our mobile technicians will leave you with an as new DPF filter, that if subjected to regular passive regeneration (by driving as prescribed) should not cause you any further issues.

If you have a DPF issue, don’t leave it to contact us immediately!

Running a vehicle with a blocked DPF filter can result in other serious damage

DPF Professional Cleaning Benefits

As long as the DPF has not been damaged beyond saving!

  • Cheaper than OEM or aftermarket replacement options
  • A legal alternative to DPF removal
  • More effective than some aftermarket DPF replacements
  • Carried out by qualified and experienced technician/mechanic
  • Free advice on original cause of DPF issues and ongoing DPF care

Contact us today to discuss options for a professional DPF Solution 

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Choosing a Good Tuner is as important as choosing a Good Doctor.

You will be presented with a bewildering selection of companies, all claiming to be the best in the industry. Unfortunately the industry has been flooded with “Get Rich Quick” merchants all desperate to take your money from you. In many cases the “Get Rich Quick” operators have invested in “Cloned” counterfeit remapping tools off the internet. They have little “if any” industry knowledge, experience or liability insurance…

Don’t get sucked in by a good story and what appears to be an incredible price. Instead of taking the word of self-acclaimed tuning experts, a search on google will reveal some very interesting, yet disturbing facts about a few “so called” professionals. Unlike some testimonials “Bert for Bognor says we are Brill” our customers are real people. Don’t take our word for it, ask the people that know best “Our Customers”

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.

Adrian McManus

Popped in to see Mike on Friday to have my A4 2.0TDi 170hp remapped. Have to say I was a little pessimistic at first having being told by another firm that remaps on these were a nightmare so was expecting the worst! Thankfully, nothing of the sort, straight in, one error message unknown but Mike worked it out and all done in no time. Straight out for a test run and the drive is very different, certainly mid ranged (where these engines seem to suffer) pulls away nicely and can definitely feel the benefit. Best money I've ever spent on a car in, well, forever! Thanks again Mike

Mark Patterson

Had the ECU my 320D remapped by Mike yesterday. Very impressed with the results. Noticed it straight away after having it done. Service was also great, talked me through all of it to get exactly what I wanted out of it. Highly recommend mpg tuning.

James Aston

Took my Civic Mk VIII 2.2 CDTI to Mike following a recommendation from a friend who's had his last few cars remapped at MPG., professional service and answered any questions I had. Customised remap that gave me a good balance between performance and economy. Mike was happy to let me watch the whole procedure and explained what he was doing. Makes a good brew as well! Would highly recommend, Will definitely bring my future motors here.

Dan Wright

Just had the ECU on my BMW 320D remapped and it is absolutely superb the power is unbelievable and the service is outstanding would recommend it to anybody he has transformed my car from 160 bhp to 207 bhp no smoke at all and the power delivery is awesome throughout all of the gears really happy.

Tom Dawson

Had my Astra 1.9cdti remapped here with EGR delete for a great price, I have now got the full power and yes it's rapid lol.... Mike was helpful and talked me through it all and also good after care as well. Thanks again.

Scott Walker

Had my T5 remapped today. Over the moon with the results! Really reasonable price and customer service is second to none! Would highly recommend!

Ethan Tunnicliffe

I had my car remap done and I'm really pleased with MPG Tuning. Great atmosphere, great service and I will recommend it to all my friends. Thank you once again. Renault Megane 2.0 Turbo petrol with 165 hp standard

David Wojtasik

Took my Astra estate for a ecu remap, excellent job feels a lot more responsive!

Umair Khalid

Mike remapped my car. Perfect professional service from start to the end. For less than 2 hours everything was done. If you want a different feeling when you are driving MPG Tuning is your place to go.

Dimitar Dimitrov

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 15 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.

Contact MPG Tuning today to discuss options for a professional ECU remap or Call Us: 01543 466 662