What is the firing order for a 2017 Hyundia Elantra 2.0?

What is your question?

I have seen it as 1-3-4-2 but when I swapped the ignition coils because I suspect I have a bad one the codes doesn't swap with how it's stated the firing order to be. I first swapped 1 with 2 because I was getting a P0301 and the code came as a P0304, then swapped 2 with 4 and code came as P0303 and then swapped 4 with 3 and code came as P0302. Any help would be greatly appreciated.

How long has your 2017 Hyundai Elantra had this problem?

A few weeks