What is a DPF?

What does a DPF do?

A DPF (Diesel Particulate Filter) or FAP (Filtre à Particules) as it is known on some french variants, is a device fitted to many modern diesel vehicles within the exhaust system. The DPFs primary role is to filter out the soot particulates within the engine exhaust gases. Unfortunately, the reliability of the DPF systems is questionable and we are now offering complete removal of the DPF for customers.

Inside a DPF

The DPF is essentially a structure of “straws” which are sealed at one end and once the exhaust gases travel down the “straw”, they cannot escape. The exhaust gases then have to diffuse through the walls of the “straws” and the soot particulates are left inside.

DPF warning lights

As the “straws” begin to fill up with soot particulates, the vehicle tries to regenerate the DPF by burning off the contents of the filter. However, to do this, the DPF must reach a temperature of 600-650c (this temperature cannot be reached whilst driving around town).

The DPF system

Inevitably, the DPF cannot regenerate and this therefore causes warning lights on the dashboard as the DPF pressure builds. Whilst the DPF is in this state, engine power is restricted and the DPF will eventually need to be replaced costing in the region of £1,500.

How is the DPF turned off?

We reprogram the cars ECU to turn the DPF off. We mostly use official Bosch and Siemens switches unlike many others.

Can I get a custom remap at the same time?

Yes, talk to us about our custom remap service and rolling road sessions.

Will I see an increase in power & economy?

Yes, the DPF removal allows your engine to breathe freely and power & economy are increased.

How do I book my car in?

Just call us on 0800 002 90 55, or fill in our quote form for a quick, no obligation quote.