Whenever you google ppf/gpf issues it only ever seems to bring results for the Kia Sportage and Hyundai Tuscon and in vast abundance too. This is due to an inherent design flaw as no petrol car should require long motorway journeys like a Diesel DPF. Presumably this is why Kia are releasing an updated model soon. Mine clogs every few weeks and has been a complete and utter nightmare to deal with.
It’s unfortunate as it is an amazing car in all other respects.