How to deal with a vehicle equipped with DPF?

Diesel particulate filters ( DPF – FAP ) should help to environmental protection.

Improper use can damage the engine and put drivers at considerable cost.

DPF is sophisticated and expensive equipment.

Most diesel vehicles made ​​after 2006 is equipped with a DPF.

By purchasing new or used vehicle with a diesel engine equipped with DPF, you have to remember that after driving approximately 100,000 km, the DPF may require costly replacement or regeneration.

Buying a used vehicle with a DPF, you should ask the seller how he cared about this part of the exhaust system.

If in the vehicle you wish to purchase the DPF lamp on dashboard lights up, 

think twice before buying, because the cost of removing the fault could range from 100€ (regeneration) up to 1000€ (exchange DPF).

How to determine if the vehicle is equipped with a DPF?

The easiest way is to check the manual, or the Internet.

You can also take a look under the vehicle.

DPF is similar to the catalytic converter.

It is located in front of the exhaust system.

In some vehicles is located behind the turbocharger, which also heats up DPF.

DPF is used in the new generation of diesel engines, Euro IV and above.

DPF works by catching particles of soot and harmful gases (oxides of nitrogen).

DPF has no standardized structure, so depending on the brand of vehicle, the differences in structure of this part of the exhaust system can be considerable.

A few years ago DPF structures were not with perfected.

It happened that on some vehicles caused repeated failures of engines.

A large group of automotive experts unofficially claims that the DPF can choke the engine, and ecological importance is overrated.

Latest DPF is refined and does not require special care - is the practical maintenance free.

Most vehicles require proceedings by certain rules, because the soot starts to burn after a few minutes’ drive.

The driver must drive several kilometres, travelling at a constant speed and keeping the engine revs at the same level.

If you cannot clean the DPF in this way, you will require a visit to the garage.

The vehicle will be connected to the computer and put the engine in the mode of purification DPF.

If you're unlucky, purification in the service mode may fail.

Then you need to remove the DPF and manually clean up.

A garage uses special formulas.

This can be very expensive.

DPF lifetime is determined for 100,000 -120,000 km.

Some the brand (e.g. Renault) provides for the exchange after driving 160,000 km.

Frequent driving in the city, a short distance, is not promotes lifetime of DPF.

In the maintenance filters, in addition to burning soot, every 30 - 60,000 km is required to refill the fluid (consumption of 3 - 5 liters).
This is a paid service action (e.g., in the Fiat Bravo 1.9 JTD cost is around 50 Euros).

The fluid is automatically dispensed to the fuel.

If you do not take care of the DPF, it may be that it will require replacement or regeneration.

Regeneration is cheaper by 10% than the new DPF.

Regeneration sometimes requires changing the oil and oil filter.

Some drivers because of the high cost of replacing the DPF and the popular opinion about the harmful effects of engine decide to remove it.

However, it requires reprogramming of the engine or uses an emulator and very importantly, will significantly increase emissions, which may lead to the problem of emissions on the NCT – DOE test.

Such action will void the warranty of a new vehicle.

No automatic cleaning of the DPF has a negative impact on engine life.

WHY?

In the briefly we can say that the burning of soot in the DPF requires extra dose of fuel.

If the dose of fuel is provided on an occasional basis, the engine does not suffer.

However, when the problem occurs more often - the fuel trickling down the sides of cylinders into the oil sump and dilutes the contents.

Then the rising level of oil in the engine and lubricating properties worsen.

Therefore, users of vehicles equipped with DPF should check the oil level at least once a month.

When there is too much oil, needs to be replaced for the new one, because in extreme cases it can lead to engine seizure and permanent damage to the DPF.

Reading it is worth wondering whether to buy a new vehicle equipped with the DPF.

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