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Hi I'm Kevin sorry for the delay I would recommend you get this checked by someone with understanding of the dpf system. The dpf collects ash emitted by engine and stores it up until the car is on the freeway and then cleans ash from dpf by a mixture of system procedures there are many things that can go wrong most are simple pressure sensor or temperature faults but sometimes dependent on usage of car and service history the car can block the dpf filter up .the dpf filters are cleanable but in most cases if it blocks this can result in replacement being needed and they are very expensive so it's always best to have system checked sooner rather than later . Hope this helps please let me know if you need to know anything else at all
Also I wouldn't drive any further than is necessary in case blockage is occurring
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