If one or more of these sensors fail, the regeneration process may not be carried out effectively. These sensors are fitted to monitor the Pre and Post temperature and pressure of the filter. Faulty / Failed Sensors - DPF's have several sensors that are installed before and after the filter.For the DPF regeneration process to work effectively and burn off the carbon deposits the engine needs to frequently get up to temperature. Short Journeys - Vehicles doing a a lot of 'town driving' are a more likely to block up due to the DPF not getting up to temperature.It is worth undertaking further diagnostics to find the route cause of the blockage. Generally speaking a blocked DPF is usually caused by another underlying issue. With more extreme cases, filters that are extremely blocked can cause the engine not to start at all. The images on the right show different examples of the a DPF, as you can imagine with the first image this is very restrictive and easy to block causing fault codes and running problems on the car.Ī blocked DPF can cause many problems including loss of power, economy and throttle response.
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