Diesel particulate filter solution (DPF) and FAP service - Quantum Tuning
DPF Regeneration | DPF replacement | DPF cleaning | DPF recalibration

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      -You have problems with your DPF
      - DPF warning lights or anti-pollution on the board
      -Coche in security mode "limp home"
      - Poor acceleration and MPG
      -Athand expensive repair costs to replace the DPF
      -Confused what is the best solution for you

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As of February 2014, the inspection of the exhaust system carried out during the ITV test will include a control of the presence of a DPF.

A missing DPF, where one was installed when the vehicle was built, will result in an ITV failure. A vehicle can still pass the ITV test of visible smoke emissions, which is primarily intended to identify vehicles that are in a very poor repair state, while emitting illegal and noxious levels of fine exhaust particles. The use of a vehicle that has been modified in such a way that it no longer complies with the emission standards for air pollutants for which it was designed to comply is a crime under the Road Vehicle Regulations (construction and use) (Regulation 61a ( 3)) 1.

The removal of a DPF will almost invariably contravene these requirements, rendering the vehicle illegal for road use. The possible penalties for non-compliance are fines of up to 1,000 Euros for a car or 2,500 Euros for a light vehicle.


A DPF (Diesel Particulate Filter) also known as FAP in some French vehicles, is a device installed in the exhaust system of modern diesel vehicles to reduce emissions and comply with European emission standards. This is done by trapping the soot (particulate matter - PM) from the exhaust gases while allowing the gases to flow through the system.

As with any type of filter, a particulate filter should be cleaned regularly to function properly. With DPF this is done by a process known as regeneration which involves a combination of a function of the catalyst in the system and burning the soot to the gas at a very high temperature leaving behind a residue of the ash inside the DPF. Regeneration must be an automatic process that takes place in the normal use of your vehicle, you may have noticed this in the form of a white smoke explosion forms the escape at times.

DPFs have been commonly used in passenger cars and light commercial vehicles since around 2003 in preparation for Euro 4 regs (2005), with Peugeot, Renault and BMW being the first buyers. Euro 5 (2009) forced diesel and light commercial cars to have a DPF installed and Euro 6 2014 would reinforce it further.


If regeneration does not work properly it leads to an accumulation of soot that affects performance and fuel economy, left unattended this will result in a blocked DPF that can ultimately cause very costly damage to other engine components. A blocked DPF is also potentially dangerous, as it can cause overheating in the exhaust system and cause a fire hazard. To avoid this damage, most new vehicles will enter the "Limp Home" security mode at this stage, which means that the vehicle will have a minimum power barely enough to crawl home.

For regeneration to take place, the vehicle is required to drive regularly at a certain speed on open roads, p. Driving the highway, typically driving around 2500 RPM for approx. 15-30 minutes at least once a month, this will keep things running.

Many diesel vehicles are used mainly in urban areas or on short stopping trips, p. Local deliveries, taxis, school careers etc. and many have the automatic gearbox, so the vehicle does not get the chance to heat up enough and is unable to carry out a full process of regeneration.

Even if the regeneration works as it should, over time the ash residue will accumulate in the DPF and will have the same effect that eventually results in a blocked DPF. For this reason, a DPF is classified as a service item by vehicle manufacturers such as brake pads or air filters, etc. and are not covered by the warranty. Therefore, DPF systems must be adequately maintained.

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If the warning light of the DPF or the anti-pollution warning is activated, do not ignore it (typical warning symbols for the board below). Get professional advice, consider your options carefully and pay attention to the problem. Leaving it will ultimately cost you much more in additional repair bills and can be dangerous.

By the time your DPF warning lights are visible, your DPF will already be significantly blocked. The regeneration forced by a garage or a "highway explosion" is not likely to cure the problem, these only work as preventive maintenance. So in this realistic stage you have the following options: -

DPF Regeneration - Quantum distributors can offer a regeneration service

DPF Replacement - Quantum distributors can replace the DPF, usually at a fraction of the cost of the main distributor.

DPF Cleaning - Many Quantum dealers offer a DPF cleaning service

DPF Recalibration - If you have removed your DPF core, your Quantum dealer will be able to recalibrate your vehicle's ECU to stop the engine in the clean operating mode and clear the DPF warning light. Consumers should be aware of the legal implications (as above) of this taking place.

The extraction of DPF is legal in certain countries and when used for off-road or motorsport - in case of doubt please take advice.

The ideal DPF solution for you depends on your circumstances, p. Type and condition of your vehicle, its use, your future plans, that is, if you intend to maintain or sell the vehicle, etc. and your budget.


-It is often said that you must "go for an explosion" down the highway to clear the DPF. Keep in mind that this is only partially true. If the DPF is blocked beyond regeneration capacity or blocked due to ash residue, it will do more damage to your engine.
    -There are many DPF cleaning additives available promising a magic cure for DPF. We still have to find one that will erase a blocked filter and will certainly not erase a blocked Ash filter. However, some products may be useful to maintain a functional DPF in good health.
    -The DPF units are closely linked to other emission components, if these parts do not work properly they can help block the DPF, similarly a blocked DPF can damage these components due to excessive back pressure.
    -The DPF units are located near the Turbo, if the turbo is dripping the oil can help block the DPF, similarly a blocked DPF can damage the turbo due to the excess back pressure.
    -Some PSA engines equipped with Peugeot, Renault, Ford, Volvo and Nissan have a fuel additive system connected to the DPF to help regeneration. It is important to maintain this system and keep it covered with the additive (only available from the main distributors approximately £ 130 per tank) if it does not block the DPF. In our experience this is often neglected, even by the main distributors because of the cost. If the DPF has removed this function as it is no longer necessary and can be deactivated.
    -Some vehicles have a dedicated DPF or emissions or anti-pollution warning light that is large, however many will only have one engine light on. It is important to verify by the diagnosis why the light is on and it is not advisable to simply turn off the light without investigation.
    -The work of DPF is complex and should only be carried out by experienced professionals with the correct specialized team. All work on a DPF must be completed with the appropriate recalibration or reset on the vehicle's ECU. It is not possible to delete the DPF electronically or simply remove the DPF unit without working on the ECU.
    -It is our experience that many garages, including major distributors are not knowledgeable of DPF and related issues. Our distributors often see customers after spending a lot of money on the wrong corrections, since the DPF failure was not correctly diagnosed.
    -Diesel Particle Filters were designed with the intention of reducing particle emissions and offer a better environment. In theory, a DPF would trap the soot in urban areas and then regenerate on the open road, unfortunately this does not always work well and leads to costly repairs.
    -The fact that the DPF units are made with expensive minerals such as platinum, that excess fuel is necessary for the regeneration process and that ultimately, the accumulated soot and ash has to go somewhere. Back to the environment that many question the global environmental value of the entire life cycle.


Mon.-Fri. 09:00-18:00  

Saturday: 09:00-15:00

We are a market leader for chip re-allocation and adjustment through a range of over 6,000 cars, vans, caravans, trucks and tractors and we work together with the UK leaders in the programming of the ECU. QUANTUM. As a quality-driven company, we are passionate about what we do and how we do it.

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