Diesel particulate filters (DPF) are filters that capture and store exhaust soot in order to reduce emissions associated with diesel engines. DPFs are designed to reduce global carbon emissions caused by the increasing number of vehicles on the road. In order for the DPF to function correctly, it needs to be regularly cleared of soot by undergoing a regeneration process. It can hold a certain amount of soot but not an abundance, so the regeneration process must be repeated frequently.
Over time, a DPF filter may become clogged. There are several possible causes of this problem, including a faulty sensor, incorrect engine oil, a failing turbocharger, or too many short journeys during which the filter regeneration process has not been initiated. Initially, an engine failure warning light will appear, and if ignored, the engine may switch to ‘limp’ mode.
