Hello, I own a Hyundai i20 petrol tank, BJ 2019. This week he was in the workshop for the inspection. There the indicator lamp for the OPF was also approached. The workshop then carried out a regeneration of the filter. After that the indicator lamp was still on, after a short motorway ride the lamp went out fortunately. I drive a relatively short distance but try to avoid it even if possible by bicycle. But this is the first time that this indicator light has been on. I have owned the car for 6 months. How often should I carry out a regeneration of the OPF in the form of a longer motorway ride? Thank you very much! Sophie