@ChrisK that was one of the items I was alluding to a few posts back when I wrote –
“Everything I have read about GPFs state that they regenerate not during constant high temperature whilst being driven (like DPFs), but they regenerate after engine reaches normal working temp and the accelerator isn’t being used. This is because the lack of fuel, but hot gases burn the soot away. Therefore, the directions given by KIA (to drive non stop) seem incorrect, which could explain why customers are having to take their car to dealerships.”
I do have some good news. After not finding a single person online who has managed to clear the filter without taking it to a dealership, I managed yesterday. I’ll post below.