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All You Need to Know about DPF Cleaning: When Should You Do It

Diesel particulate filters (DPFs) are essential components in modern diesel engines that help to reduce harmful emissions. DPFs trap soot and other small particles that could cause environmental pollution. However, like any other component in your car, DPFs require regular maintenance to remain efficient and effective. In this article, we will explore when you should have your DPF cleaned.

What Is a DPF?

A DPF is a device that traps soot and other small particles from the engine. The trapped particles are then burned off at high temperatures, leaving behind only harmless ash. DPFs are critical in reducing harmful emissions from diesel engines.

When Should You Have Your DPF Cleaned?

The frequency of cleaning your DPF depends on various factors, including how often you drive, the type of journey you undertake, and the age of your car. Here are some signs that indicate it is time to clean your DPF:

Warning Light

Modern cars have a DPF warning light that illuminates the dashboard when the DPF is clogged. The warning light usually appears as a yellow engine symbol with an exclamation mark. If the warning light comes on, taking action immediately and having your DPF cleaned is essential.

Reduced Engine Performance

A clogged DPF can cause a reduction in engine performance, resulting in sluggish acceleration, power loss, and decreased fuel efficiency. If you notice these symptoms, it is time to have your DPF cleaned.

Increased Fuel Consumption

A clogged DPF can also cause an increase in fuel consumption. If you notice that you are filling up your car more frequently than usual, it could be a sign that your DPF needs cleaning.

Smoky Exhaust

If you notice that your car’s exhaust is emitting more smoke than usual, it could be an indication of a clogged DPF. The soot trapped in the DPF can cause the exhaust to emit excessive smoke.

Unusual Smell

A clogged DPF can also cause a strange smell, similar to burnt rubber or rotten eggs, emanating from the exhaust. The smell results from the build-up of soot and other particles in the DPF.

How to Clean Your DPF?

There are two main methods of cleaning your DPF. The first method is passive regeneration, which occurs during normal driving. Passive regeneration involves burning off the trapped soot at high temperatures while driving at high speeds for an extended period. However, passive regeneration is not always effective, especially if you do not undertake long journeys regularly.

The second method is active regeneration, which involves using a special additive to lower the temperature at which the soot is burned. Depending on the car model, active regeneration can be done manually or automatically. In manual active regeneration, the driver initiates the process by pressing a button on the dashboard. Automatic active regeneration occurs when the car’s computer senses that the DPF is clogged and initiates the process automatically.


DPFs are essential components in modern diesel engines that help to reduce harmful emissions. You should have your DPF cleaned when you notice any of the above signs, including warning lights, reduced engine performance, increased fuel consumption, smoky exhaust, and unusual smell. Cleaning your DPF can be done through passive, active, or combination regeneration. Regular cleaning of your DPF ensures that your car remains efficient and effective while helping to reduce harmful emissions.

Book your DPF cleaning mobile service today and experience the benefits of a clean diesel particulate filter! DPF Fixer Ltd is here to provide thorough and efficient cleaning of your diesel particulate filters wherever you are in the UK. Say goodbye to clogged filters and hello to improved performance and reduced emissions. Call DPF Fixer Ltd now and enjoy the peace of mind of knowing that your vehicle is in good hands.

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