A Nissan Qashqai was giving the following fault codes P2002 & P242F. 

Here at Aj Fleetcare we are very busy on DPF assessments & cleaning but we will always get to the root cause of your problem . A blocked DPF is generally caused by an underlying fault . This is the reason why we always carry out a DPF assessment followed by a 3 stage JLM chemical clean if required. We are a specialist in this field & now thousands of DPF assessments in saving you time & money for the correct diagnosis. Example below

Nissan Qashqai underlying faults found & fixed & a 3 stage clean free customer follow up & confirmed fix.