How I cleared the PPF/GPF-
I did a combination of KIA’s recommendation and info I’ve read regarding PPF/GPFs-
KIA’s instructions are to maintain the following-
- 30 mins +
- 50mph+
- 1,500-4,000
I did this for 35-40mins and the warning message persisted. Knowing the engine would be very hot now, my next aim was to fully release accelerator, moving into left hand lane and letting the car drop speed to 50mph. Fortunately, many stretches of the M62 are hilly, giving me the opportunity to accelerate up hill and “roll” downhill without my car slowing down too quickly. The warning message disappeared after 10-15mins.
I believe that so long as engine temp is high (which could be achieved sooner than KIA’s 30mins+) the engine braking is what actually clears/burns the sooty deposits.
Although I am pleased that I have managed to clear the filter, if this problem reoccurs, I’ll have to look at my options. In an already inefficient car, I can afford to be driving around just to clear a fault.