Everything You Need to Know About Diesel Particulate Filter (DPF) Cleaning

If you drive a diesel vehicle, chances are your car is fitted with a Diesel Particulate Filter, or DPF. While most drivers have heard the term, not everyone knows just how important this component is—or what to do when it gets clogged. Let’s break it down.

What Is a DPF and What Does It Do?

A Diesel Particulate Filter is a device fitted to the exhaust system of modern diesel vehicles. Its job is to capture and store soot and particulate matter from the exhaust gases, helping to reduce harmful emissions and keep your vehicle road-legal.

Over time, though, this soot builds up and the filter becomes blocked—especially if the vehicle is mainly used for short journeys or around town. When this happens, the DPF needs cleaning to restore performance and avoid costly repairs.

Signs Your DPF Might Be Blocked

A blocked DPF can cause a number of symptoms, including:

• Warning lights on the dashboard (often a DPF light or check engine light)
• Reduced engine performance or “limp mode”
• Poor fuel economy
• Increased exhaust smoke
• Difficulty starting the vehicle

Ignoring these signs can lead to further damage - not to mention a failed MOT.

What Is DPF Cleaning?

DPF cleaning is the process of removing built-up soot and ash from the filter. This can be done in several ways:

• Active regeneration: This happens automatically when the engine reaches high enough temperatures, usually during longer drives.
• Forced regeneration: Carried out by a mechanic using diagnostic equipment to heat up the DPF and burn off the soot.
• Off-car DPF cleaning: The most thorough method, where the filter is removed and cleaned using specialist equipment to clear even stubborn ash and debris.

Why Is It Important?

Keeping your DPF clean is essential to:

• Maintain fuel efficiency
• Keep emissions low
• Avoid breakdowns or expensive replacements
• Pass your MOT

A blocked DPF doesn’t just affect your engine - it can lead to turbo issues and damage to other parts of your exhaust system if left untreated.

How Often Should You Clean Your DPF?

There’s no set schedule, as it depends on your driving style. If you mostly do short trips or city driving, you’re more likely to experience build-up sooner. As a rule of thumb, regular checks and cleaning every 60,000–100,000 miles is recommended - or sooner if warning signs appear.

Final Thoughts

A healthy DPF is key to a clean-running, efficient diesel engine. At Revamp 360, we offer professional DPF cleaning services across South Devon to help keep your vehicle running smoothly, avoid MOT issues, and extend the life of your engine.

Noticed a warning light or reduced performance? Don’t ignore it - get in touch today and let us help you breathe new life into your diesel engine.