The service tech informed me that Kia has VIN specific engine issue. Since my problem has occurred with my engine the dealership where my vehicle was had three in the service lot with the same issue when I dropped mine off and acquired four more since one of which the engine blew a hole in the hood.
Just another bunch of BS. Believe that one and I have a bridge to sell you as they've replaced @ million engines in the 2011-2019 Optima, 2012-2019 Sorento,
2011-2019 Sportage, add the Hybrid junk engine problems to the list, and one can see that there is no logic to engine/VIN specific.
Check the NHTSA recalls for 2020 Kia Optima and there are no recalls, but if there was a recall for VIN specific, the recall would be listed but the site would indicate that the recall is for specific units within that model year.
Guess the 2020 owners will be posting quite a bit in the future, and as I said previously, welcome to the group.