26 Jan, 11

DPF Removal & Smoke-Correction Service

Sinspeed DPF Removal Smoke Correction Problem ServiceDPF Removals are becoming very common as the years progress, they continue to fail and manufacturers continue to release newer cars with Diesel Particulate Filters (DPF). The Diesel Particulate Filter (DPF) is also known as a Filtre à Particules (FAP) and some people even dealerships refer to it as CATS (Catalytic Converters) however, they should not be mistaken as they operate differently.

For more information on how a Diesel Particulate Filter (DPF) / Filtre à Particules (FAP) works, check out our DPF Removal article.

Problems after DPF Removal

Having the DPF removed is meant to bring peace of mind. After having endless battles up & down the motorway trying to regenerate your DPF, spending £100’s if not £1000’s taking it to dealerships for regenerations / oil changes and actual DPF replacements – a DPF Removal is meant to take the problem away completely & forever, leaving you with a vehicle that is reliable, efficient and responsive, with zero errors & zero problems. However, what people are left with is in many cases completely different. We’ve heard some real horror stories of people who have (before finding us), attempted to have their DPF’s removed by other “companies” and “mobile agents”, problems such as:

  • DPF Warning Light Coming Back
  • Car Going Into Limp Mode (also known as Limp Home Mode)
  • Ignition Coil Light Flashing
  • Traction Light On
  • Excessive Smoke
  • Turbo / Engine Failure
  • MOT Failure

DPF Removal - Smoke Correction Service

Why do these problems occur?

Most problems are related to the software companies & mobile agents are using.

Firstly, we are against doing MOBILE DPF Removals and the reason behind this is, the only way to do a “Mobile DPF Removal” is using an automated piece of software which scans through the cars ECU data and attempts to delete all data strings related to the DPF file structure (within pre-set parameters). However, this software can never 100% delete all data strings because they are interlinked and deep-coded with file structures relating to:

  • Fuel Rail Pressure
  • Exhaust Gas Temperature
  • Air / Fuel Ratio
  • & Many Others..

If the automated software was to delete the interlinked & deep-coded file structures, this would interfere with these sensors and cause data corruption and many errors to occur almost immediately after starting the engine. Some problems don’t actually occur for some time after the DPF has been removed.

In most cases, the automated software won’t delete these parts of the file, but then leaving part of the DPF file in place will also bring problems such as the vehicle falling back into limp mode, the DPF light coming back on, excessive smoke and as a result of this, an MOT Failure.

The Sinspeed DPF Removal ApproachDPF Removal - Smoke Correction Session

Unlike other companies & mobile agents, we do not touch any automated software. After reading and downloading the data from your ECU, we manually scan through the 1000’s of data strings looking for all DPF file structures. We then proceed to delete & modify any data strings to command the ECU that the DPF is no longer existing nor required on the vehicle for it to run correctly. On doing so, the ECU will run as it should without having a DPF on the car and will be guaranteed to not cause any errors. It is the only sure-way of a successful DPF Removal.

Furthermore, just by removing the DPF, you cannot guarantee it will pass an MOT. Although it is not illegal to remove the DPF / FAP from the vehicle, it may still fail an MOT if your vehicle does not meet the necessary smoke detection levels at an MOT test.

After having successfully removed 100% of the DPF data file structure, we then proceed to carry out a full smoke-correction session (inclusive of all DPF removals by Sinspeed). This enables us to fine-tune the system to run optimally and efficiently with no errors after having removed the DPF and by doing so, allow your vehicle to continue to pass an MOT.

We are currently the only company in the whole of the UK who offer this smoke-correction service.

If you’re looking at having your DPF Removed but you’re not sure on how this will effect the running of your vehicle or have any further enquiries, please do not hesitate to call us direct on our enquiries & booking line: 0844 847 9999

Tags : Diesel Particle Filter Removal, Diesel Particle Filter Removal MOT law, DPF Removal, DPF Removal MOT law, DPF Smoke, Excessive Smoke, Filtre à Particules (FAP), Is DPF Removal Illegal?, limp mode, MOT Failure, Removing DPF MOT Fail, Smoke after DPF Removal, The DPF Light Is Coming Back On.
90 thoughts on “DPF Removal & Smoke-Correction Service
  • Hi Jason does your lifetime guarantee cover any/all software related dPF issues once DPF has been removed. I’ve got a 2016 insignia 170 brake 28000 miles no issues and runs add blue euro 6. Could I please have a price for removal of the DPF and do you think I should have the EGR removed and mapped out also thanks Chris

    • Hi Chris

      Thanks for the enquiry,

      Our software warranty covers any software related DPF problems that were not caused by a third-party. Having the EGR deleted at the same time as a DPF removal is a popular choice. I have sent you an email, kindly respond with your postal code and vehicle registration for a customised quote.

      Kind Regards


  • Hi, i have a 2007 e70 bmw x5. the dpf has been removed and the guy told me that he dit the remapping on it. however when i drive there is no smoke at all and even when i stop there is nothing but when the car idles for about 2minutes then it starts to smoke a lot out of both exhaust pipes and it smells very strong. what can it be?

    • Hi Dirk

      Thanks for the enquiry,

      If the software has not been correctly adapted, it can cause all sorts of problems, including diesel smoke whilst stationary. We’re able to download the configuration files from your ECU and confirm whether the software has been professionally adapted and if not, we can make the necessary corrective changes and reload it to your vehicle’s engine ECU.

      I have sent you an email with full information and pricing, if you have any questions, please reply to the email and we’ll be happy to assist you.

      Kind Regards


  • is it normal for the engine to smoke after dpf removal and software delete,,,it was smoking before removal anyway

    • Hi Fernando

      Thanks for the enquiry,

      If the DPF Removal programming has not been carried out correctly, it can increase the smoke output from the exhaust. You may also have other underlying issues, which can contribute towards the excessive smoke. When the DPF is still in the exhaust, it will trap a lot of the smoke and so it may not be noticeable until the DPF is removed.

      I have sent you an email with this information. If you have any questions or would like for us to take a look at the vehicle for you, please reply to the email and we’ll be happy to assist you.

      Kind Regards


  • Hi i have a e60 530d since having stage 2 remap dpf cat delete the car smokes too much at idle and Also I think the cat is not been fitted back correctly causing diesel smell when i open the windows
    Could you Give me a price For this please
    Also could you get 300bhp without smoke?

    • Hi Ja

      Thanks for the enquiry,

      We can definitely take a look at that for you – there are a number of reasons the vehicle will smoke on idle. I can see that someone from our team has sent you an email already with full information and pricing. If you have any questions, please reply to the email and we’ll be happy to assist you.

      Kind Regards


  • My Audi B8 has been removed the DPF and I drove it for about a week and the car was driving perfect, and then it started having a lot of white smoke when I drive, the smoke just disappear for a two day and then it came back again. Please assist on what could be the cause.thank you

    • Hi Reginald

      Thanks for the enquiry,

      It sounds like the ECU is still trying to regenerate a DPF which is no longer there and the result is smoke from the exhaust. It may be that the filter was removed and programming was never done or that the programming was done poorly and some elements were either incorrectly configured or missed completely. Either way, we can help find the root cause and correct the issues for you.

      I have sent you an email, kindly respond with your vehicle registration and postal code for a customised quotation.

      Kind Regards


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