2014 Sorento EX - P2098 code

Code just came on this morning, 43000 miles EX model, 3.3 engine. Any ideas about possible causes and the order to diagnose/correct?

sounds like you might have a O2 sensor going out or a dirty MAS or a cat convertor wearing out.
this web site lists possible causes

https://www.autocodes.com/p2098_kia.html