DPF System Cleaning Service | Newbury 4x4 Centre

Diesel Particulate Filters

Diesel Particulate Filters (DPF) are an essential part of modern vehicles. It is a filter in the exhaust system that reduces harmful emissions and pollutants to protect our environment and health.

Without the correct driving cycle, the DPF cannot regenerate correctly, resulting in it becoming blocked. Our technicians can offer a DPF clean, regeneration or full replacement.

If your unit fails, a new costly unit will need to be installed, so it is important not to overlook the DPF. We can offer a same day test & clean on removed units, so we can get you back on the road in no time.

Please refer to our DPF article in our knowledge hub for more information.

The underside of a vehicle showing the DPF System

DPF Cleaning Service - Frequently Asked Questions

What is a DPF and why does it need cleaning?

The Diesel Particulate Filter (DPF) is designed to capture and store soot from the engine’s exhaust to reduce emissions. Over time, especially with short journeys or stop-start driving, the filter can become blocked if it does not reach the correct temperature to regenerate. When this happens, it may need a professional cleaning service to restore proper airflow and performance.

How do I know if my DPF is blocked?

Common signs of a blocked DPF include a warning light on the dashboard, reduced engine performance, increased fuel consumption, cooling fan running more often, or the vehicle entering limp mode. In many cases, these symptoms develop gradually, and drivers may not realise there is an issue until performance is noticeably affected.

Can I keep driving with a DPF warning light on?

You may be able to continue driving for a short period, but it is not recommended to ignore a DPF warning. Continued driving with a blocked filter can lead to increased back pressure, reduced engine performance, and potentially more expensive repairs. In some cases, the vehicle may eventually enter limp mode to protect the engine.

What causes a DPF to block up?

DPF blockages are often caused by repeated short journeys where the exhaust system does not reach the temperature required for regeneration. Other contributing factors can include faulty sensors, engine issues causing excessive soot production, or interrupted regeneration cycles. Vehicles used mainly for town driving are more likely to experience DPF problems.

What is involved in a DPF cleaning service?

A professional DPF cleaning service involves diagnosing the level of blockage, checking sensor readings, and determining whether the filter can be safely cleaned rather than replaced. If suitable, the DPF is cleaned using specialist equipment to remove accumulated soot and ash, helping to restore proper exhaust flow and engine efficiency.

Will a DPF clean fix the problem permanently?

A DPF clean can restore performance if the filter is blocked, but it does not prevent future issues from occurring. If the driving style remains unchanged or underlying engine faults are present, the problem may return. Regular servicing and addressing any related engine issues are key to maintaining long-term DPF health.

How can I avoid DPF problems in the future?

Regular longer journeys at sustained speeds can help the DPF regenerate naturally. Even just a 30-40 min drive at a constant speed of around 50 mph on an A-road or motorway weekly can prevent issues.