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Got a DPF fault? Is your DPF clogged? Want to avoid expensive replacement fees for your DPF?

Our diagnosis and 2-step cleaning is your best option!

Why does it get clogged up? There are numerous reasons why a DPF may become saturated ranging from incorrect driving habits to failed components such as sensors and EGR valves that must work correctly for the DPF to regenerate (clean itself out). The biggest mistake we see with DPF issues is incorrect or lack of diagnosis and assumption that simply cleaning the filter will resolve the problem. Until a DPF issue is diagnosed there is no point cleaning the filter. We have a great wealth of knowledge and specialise in the diagnostics of DPF systems. Our diagnostics includes live data analysis and manual filter pressure testing. 

If required how do we clean the filter? We use a 2-step chemical system that is pressurised in through the DPF pressure sensor pipe directly into the DPF. This means in the majority of instances there is no requirement to remove the DPF for cleaning.

  • Dougie Hamilton AvatarDougie Hamilton

    Had my Sprinter van remaped today, great service very friendly and explained everything he was doing in a fairly simple way that even I could understand. Van is now going great, it's 11years old, and pulling like a cheap hooker. Came home and pulled a mini digger and trailer up a very big hill no worries.

    Martin Ridley AvatarMartin Ridley

    Excellent service from James. Fully explained the process and answered any questions comprehensively. In terms of the carbon clean - amazing difference to my car. Much more responsive, smoother acceleration, noticeably faster than before, quieter when running and MPG has improved by approx 15%. Highly recommend!

  • Yessin MYazz AvatarYessin MYazz

    I just had a carbon clean in my B200 Mercedes,

    And it feels much more powerful, great job, shows u in live data how it was and once the job is done, Red shows you the difference 100% Recommended!!

    Danny English AvatarDanny English

    Had my Suzuki sv650 done today, actually made a great difference the revs are much more responsive and the acceleration has picked up. Although it's quite a powerful bike the cleaning process made it feel more responsive and really smooth ride defiantly recommend.

  • Darren O'Hare AvatarDarren O'Hare

    Had a Stage 3 carbon clean on my Ford Mondeo 2.2TDCi which has covered just over 100,000 miles. My car would on occasion smoke badly under hard acceleration and I also felt that it had a bit less power of late. James was punctual, professional and talked me through the cleaning process. Having just come back from a test drive, I am delighted with the results. The car now ticks over at a lower rpm, is a little bit quieter and certainly accelerates quicker particularly in 3rd and 4th gear. Would highly recommend.

    Just a quick follow up to my review which I posted on 10 March 2018. Since then I have covered over 800 miles and am now averaging 40.5 mpg which is around 5 mpg better than I was getting before the carbon clean. Definitely impressed with the results.

    Onicalã Robert Daniel AvatarOnicalã Robert Daniel

    Very good service for your car if 're looking forward to get back your horses back . 5 star plus

  • Afsin Balcar Ozeker AvatarAfsin Balcar Ozeker

    Very professional, very friendly and fantastic result. Highly recommend.

    Aaron Latus AvatarAaron Latus

    Adam took my car in for a stage one remap and il be definitely booking back in for the near future for a carbon clean too.. I’ve never had the car running so well after a remap, went from 184bhp to 220bhp and I’m getting more miles to the galloon great service.. also got an extra 70NM of torque car is running like new.. recommend to anyone looking a remap best about 🤙🏻

  • Matt Johnson AvatarMatt Johnson

    Had both my BMW and my Mini Carbon Cleaned by Winston. Very pleased with the results and a great guy

    Matty Coldwell AvatarMatty Coldwell

    Good and friendly service my car runs a lot better all the power is back he explained everything he was doing I will use agein in future

DPF diagnosis and 2-step cleaning
DPF Clean on a Nissan Qashqai 1.5dci

Understanding the DPF System

Emissions requirements for new vehicles require Particulate Filters to be fitted to the exhaust of diesel vehicles since the ‘Euro 5’ standards were enforced in 2009. Prior to this many vehicles also have a DPF fitted in anticipation of the change to regulations. This ‘Euro 5’ and beyond standards aim to deliver reductions of >80% in soot (diesel particulates). However, these filtration systems are not without problems causing DPF warning lights, engine limp mode safety activation, reduced efficiency/mpg and poor engine performance.

The diesel particulate filter is mounted as part of the exhaust system. In order for the filter to operate correctly, it must regularly run a regeneration process to burn off the continuously accumulating soot. This process is completed by precisely regulating an increased temperature of the exhaust gas passing through the filter which then burns away the carbon deposits. To do so a sensor transmits data to an engine control unit that then calculates the precise requirement for post-injection fuel to increase the temperature during the regeneration phase. As with any filter, the DPF must be regularly emptied otherwise, over a period of time, it will start to clog up and will eventually become partially blocked. Passive regeneration of the DPF can only occur at fast speeds on a motorway or A-road so with all the local driving and short journeys for many vehicles this process cannot occur often enough eventually leading to clogging of the DPF.

How does the DPF Regeneration process work?

Passive regeneration

The DPF system is designed in such a way that when the engine is consistently running at approximately 2,500 rpms or more (e.g. on a motorway or fast A-road) the exhaust gas temperatures exceed 350°C soot particles are constantly being burned off without any engine management intervention.

Active regeneration:

Where the vehicle is predominantly used for urban mileage the exhaust gas temperatures fail to get hot enough passive regeneration is no longer achieved. Therefore soot particles are no longer being burned off so start to accumulate inside the filter. This leads to clogging of the filter and when a threshold is reached the engine’s control unit (ECU) triggers the active regeneration at its next opportunity. The amount of soot accumulated inside the DPF is calculated by the ECU based on:- ‘Driver profile’ – whereby the ECU records the pattern of exhaust gas and oxygen temperature sensor readings and then calculate the degree of saturation, and DPF flow resistance’ – whereby the ECU records signals from sensor regarding flow, temperature and pressure and then calculates of the degree of saturation.

The pressure is measured at both the inlet and outlet of the DPF and the degree of saturation inside the filter is measured by the pressure sensor calculating the difference between the two readings. As the filter becomes clogged the voltage transmitted by the pressure sensor to the ECU rises. At a manufacture set voltage reading the ECU will proceed to raise the temperature of exhaust gas to approximately 600°C thus actively starting the regeneration process. The ECU instructs this increase in temperature by:

  • Regulating air flow through the Electronic Throttle Control (ETC).
  • Switching the Exhaust Gas Regeneration (EGR) valve so that it recycling exhaust gases thus increasing engine combustion temperature.
  • Enforcing a post-injection following the principal injection in order to increase the combustion temperature.
  • Enforcing a second post-injection which leads to unburnt fuel evaporating inside the combustion chamber. The unburnt hydrocarbons are oxidised by vapor inside the catalyst converter. During these stage temperatures inside the DPF can reach 620°C.
  • The sensor signal, upstream of the DPF, supplies the ECU data to determine the quantity of fuel to be injected during the second post-injection.

Forced regeneration:

When the DPF system has exceeded a set level of saturation it becomes impossible for the vehicle to perform a passive or active regeneration. A mechanic may at this stage attempt what is known as a forced regeneration using a computer to instruct the DPF system to heat up (similar to the active regeneration process) and burn off the excess soot. Depending on the vehicle this will either be done whilst driving or possibly stationary with the engine running and the ecu controlling the RPMS.

Unfortunately all too often forced regenerations will fail or only be beneficial for a short period of time. Why? Simply because either the saturation is too high or the operator has not diagnosed and repaired the fault causing the DPF system to fail the process.

If a forced regeneration fails its common practice you’ll be told a mechanic that a new DPF is required and at huge expense. In most instances this advice, even when it’s from the manufacturer dealers, is inaccurate!

What it more than likely means is the mechanic has reached the limit of their understanding of a very complicated system and therefore assumes the DPF has completely failed. In our experience, this diagnosis is rarely correct. For most replacing the DPF will only resolve the problem short-term, with the fault still present it’s only a matter of time before the new expensive DPF  also becomes saturated.

As a preventative measure against clogging of DPF’s we recommend an engine carbon cleaning treatment every 10,000 – 12,000 miles.

If your vehicle has a DPF issue, or has even failed a DPF regeneration by a professional, and therefore requires professional intervention to diagnose and resolve the problem there is no better alternative than a skilled UKCC technician.

Starting at just £249.99 (including dealer level diagnostics and manometer pressure testing) our DPF Cleaning method is the least expensive option. The advantages are:-

  • Our Mobile Carbon Cleaning Technicians come to you
  • Potentially no expensive parts
  • No disassembly is required, therefore no expensive labour
  • Completed in an average of 2-3 hours so no requirement to leave your vehicle with professionals for days on end
  • We are fully insured to complete this service at the roadside or wherever your vehicle is located

Book A DPF diagnostics and clean service

If you require further information please visit our DPF Cleaning FAQ’s section, contact your local technician or our HQ team on 01293 769495 to discuss your requirements, or use the inquiry form below and we’ll get back to you at your convenience.

Further questions? Make an enquiry

Click on the following links to view our other engine cleaning services – Carbon Cleaning | EGR Valve | Oxygen Sensor | Intake Valves | Spark Plugs | Catalytic Converter | Intake Manifold | Turbocharger | Fuel Injectors | Smoky Exhausts

 

Over 5,000 satisfied UK & Ireland customers since 2016..

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Prices for Vehicle Type

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Motorbikes
£74.99
Hydrogen engine carbon cleaning plus FREE diagnostics Book
£104.99
Hydrogen and injector engine carbon cleaning plus FREE diagnostics Book
£224.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement. Book
£249.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement plus an engine carbon clean service Book
Car (Petrol)
£89.99
Hydrogen engine carbon cleaning with FREE diagnostics Book
£119.99
Hydrogen engine carbon cleaning and injector cleaning plus FREE diagnostics (recommended for non-turbo vehicles) Book
£149.99
Hydrogen, injector and chemical engine carbon cleaning plus FREE diagnostics (recommended for turbo vehicles) Book
£224.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement. Book
£339.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement plus an engine carbon clean service Book
£399
The Ghost is the original aftermarket CAN bus immobiliser. Protect your car or van from theft like nothing else on the market today. The Ghost protects your car from key-cloning, hacking, and even key theft. The Ghost has no key-fobs or LED indications to give away its location. The Ghost uses the buttons in your vehicle such as those on the steering wheel, door panels or centre console, to allow you to make a unique, changeable, disarm sequence (like a PIN code) that must first be entered before you can drive your car. Just like your credit card but you can make your car disarm sequence even safer by making it up to 20 presses long! In order to make extreme security also be hassle-free, there is a smart-phone application that connects to your car and allows you to get in and drive without having to enter the disarm sequence. NOTE: Call to check compatibility with your vehicle. Book
Car (Diesel)
£89.99
Hydrogen engine carbon cleaning plus FREE diagnostics Book
£119.99
Hydrogen and injector engine carbon cleaning plus FREE diagnostics Book
£149.99
Hydrogen, chemical and injector engine carbon cleaning plus FREE diagnostics (recommended for vehicles with no DPF or that use Ad-Blue) Book
£179.99
Hydrogen, chemical and injector engine carbon cleaning plus FREE diagnostics (recommended for vehicles with a DPF and do NOT use Ad-Blue) Book
£249.99
First, we will complete a thorough check and diagnosis of your vehicle and the DPF system. Then a DPF clean will be performed and the computer will be reset before a test drive to ensure success. Book
£299.99
First, we will complete a thorough check and diagnosis of your vehicle and the DPF system. Then a DPF clean will be performed and the computer will be reset before a test drive to ensure the success of the DPF cleaning. Then a 1-stage Hydrogen engine carbon cleaning service will also be provided to ensure your engine is running at optimal levels! Book
£319.99
First, we will complete a thorough check and diagnosis of your vehicle and the DPF system. Then a DPF clean will be performed and the computer will be reset before a test drive to ensure the success of the DPF cleaning. Then a Hydrogen and injector engine carbon cleaning service will also be provided to ensure your engine is running at optimal levels! Book
£339.99
First, we will complete a thorough check and diagnosis of your vehicle and the DPF system. Then a DPF clean will be performed and the computer will be reset before a test drive to ensure the success of the DPF cleaning. Then a Chemical, Hydrogen and injector engine carbon cleaning service will also be provided to ensure your engine is running at optimal levels! Book
£224.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement. Book
£339.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement plus an engine carbon clean service Book
£399
The Ghost is the original aftermarket CAN bus immobiliser. Protect your car or van from theft like nothing else on the market today. The Ghost protects your car from key-cloning, hacking, and even key theft. The Ghost has no key-fobs or LED indications to give away its location. The Ghost uses the buttons in your vehicle such as those on the steering wheel, door panels or centre console, to allow you to make a unique, changeable, disarm sequence (like a PIN code) that must first be entered before you can drive your car. Just like your credit card but you can make your car disarm sequence even safer by making it up to 20 presses long! In order to make extreme security also be hassle-free, there is a smart-phone application that connects to your car and allows you to get in and drive without having to enter the disarm sequence. NOTE: Call to check compatibility with your vehicle. Book
LGV (Petrol)
£119.99
Hydrogen engine carbon cleaning plus FREE diagnostics Book
£139.99
Hydrogen and injector engine carbon cleaning plus FREE diagnostics Book
£224.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement. Book
£339.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement plus an engine carbon clean service Book
£399
The Ghost is the original aftermarket CAN bus immobiliser. Protect your car or van from theft like nothing else on the market today. The Ghost protects your car from key-cloning, hacking, and even key theft. The Ghost has no key-fobs or LED indications to give away its location. The Ghost uses the buttons in your vehicle such as those on the steering wheel, door panels or centre console, to allow you to make a unique, changeable, disarm sequence (like a PIN code) that must first be entered before you can drive your car. Just like your credit card but you can make your car disarm sequence even safer by making it up to 20 presses long! In order to make extreme security also be hassle-free, there is a smart-phone application that connects to your car and allows you to get in and drive without having to enter the disarm sequence. NOTE: Call to check compatibility with your vehicle. Book
LGV (Diesel)
£139.99
Hydrogen and injector engine carbon cleaning plus FREE diagnostics Book
£119.99
Hydrogen engine carbon cleaning plus FREE diagnostics Book
£169.99
Hydrogen, chemical and injector engine carbon cleaning plus FREE diagnostics (recommended for vehicles with no DPF or that use Ad-Blue) Book
£199.99
Hydrogen, chemical and injector engine carbon cleaning plus FREE diagnostics (recommended for vehicles with a DPF and do NOT use Ad-Blue) Book
£339.99
First, we will complete a thorough check and diagnosis of your vehicle and the DPF system. Then a DPF clean will be performed and the computer will be reset before a test drive to ensure the success of the DPF cleaning. Then a Chemical, Hydrogen and injector engine carbon cleaning service will also be provided to ensure your engine is running at optimal levels! Book
£319.99
First, we will complete a thorough check and diagnosis of your vehicle and the DPF system. Then a DPF clean will be performed and the computer will be reset before a test drive to ensure the success of the DPF cleaning. Then a Hydrogen and injector engine carbon cleaning service will also be provided to ensure your engine is running at optimal levels! Book
£299.99
First, we will complete a thorough check and diagnosis of your vehicle and the DPF system. Then a DPF clean will be performed and the computer will be reset before a test drive to ensure the success of the DPF cleaning. Then a Hydrogen engine carbon cleaning service will also be provided to ensure your engine is running at optimal levels! Book
£249.99
First, we will complete a thorough check and diagnosis of your vehicle and the DPF system. Then a DPF clean will be performed and the computer will be reset before a test drive to ensure the success of the DPF cleaning. Book
£224.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement. Book
£339.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement plus an engine carbon clean service Book
£399
The Ghost is the original aftermarket CAN bus immobiliser. Protect your car or van from theft like nothing else on the market today. The Ghost protects your car from key-cloning, hacking, and even key theft. The Ghost has no key-fobs or LED indications to give away its location. The Ghost uses the buttons in your vehicle such as those on the steering wheel, door panels or centre console, to allow you to make a unique, changeable, disarm sequence (like a PIN code) that must first be entered before you can drive your car. Just like your credit card but you can make your car disarm sequence even safer by making it up to 20 presses long! In order to make extreme security also be hassle-free, there is a smart-phone application that connects to your car and allows you to get in and drive without having to enter the disarm sequence. NOTE: Call to check compatibility with your vehicle. Book
HGV
£199.99
Hydrogen engine carbon cleaning plus FREE diagnostics Book
POA
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement. Book
Other Vehicle
£99.99
We'll bring our Hydrogen carbon cleaning machine to your boat. Book