I got a CEL (code P1326), three different times. Each time has been after a hard rain or a car wash. I have had to pay to have the knock sensor replaced each time, twice by a mechanic and once by a Kia dealership. Theres a recall for this issue on model years older than my 2020. I was told that Kia is aware but that there arent enough people having the issue to warrant them to investigate.