A Diesel Particulate Filter, sometimes called a DPF, is a device designed to remove diesel particulate matter or soot from the exhaust gas of a diesel engine. DPF's usually remove 85% or more of the soot. In addition to collecting the particulate, a method must exist to clean the filter. Most filters are designed to burn off the accumulated soot through the use of active technology, such as a fuel burner which heats the filter to soot combustion temperatures, through engine modifications. The engine is set to run a certain specific way when the filter load reaches a pre-determined level, which will oxidize the particulates at relatively low temperatures. This is known as 'filter regeneration'. The first indication of a fault is usually the EML (Engine Management Light) coming on. If you have a problem with the DPF not regenerating, then the alternative may be a forced regeneration, much cheaper than replacement costs of anything up to ?1000. We have the necessary equipment and software to carry out these tasks on most makes and models at considerably less cost than DPF replacement.