As with any filter, a DPF needs to be clean and clear to work efficiently and this should happen with a process called regeneration. This would naturally take place in diesel vehicles spending more time running at their optimum engine temperature; under these conditions the DPF periodically clears itself once heated to its optimum temperature.
In situations where the engine is running at less than its optimum temperature, such as during frequent stop/start driving or a series of short trips, the filter can’t clear itself. As a result it eventually gets clogged with soot that affects performance, economy and emissions.
It can be prevented by periodic (at least monthly) higher speed runs on an open road, but once symptoms of a build up of soot occur such as a fall-off in performance or the DPF warning or anti-pollution light illuminating, then it’s usually too late.
The DPF would require replacement at usually considerable cost - possibly well into four figures.
Even the DPF in a vehicle spending more time at its maximum engine temperature will lose its regeneration capabilities in time so will require replacement. Manufacturers class the DPF as a normal ‘wear and tear’ item similar to brake pads and clutches, so it isn’t covered by the vehicle warranty.
You could replace your DPF with one from your manufacturer - but this could well cost over £1,000.
You could save money by replacing it with a generic after market DPF but this is a gamble; they don’t always last that long and can, because they’re not the manufacturer’s own and can be difficult to fit.
DPF Solution - this would be a fraction of the price of replacement, and there’s no need to worry about emissions; our DPF solutions are MOT friendly so your vehicle will pass the emissions test.