Does anyone have any experience with this code? Internet says belt, or misfire which I don't believe is the case (misfire) as it doesn't run rough at all.

How old is your machine and your belt? Have you ever smoked your belt (smelt it burning)?

It's either an 18-19, I'm not the main driver but I personally have never smoked it nor smelt it smoking.

Is it the original belt? If so, I would start there. Probably time for it anyways

It is the original belt. Probably time to bring it into a shop and just have them go through it head to toe.

I have a 2019 1000 XPS Premium that popped up same code 2 years ago. Was sitting for 2-3 months. Swapped spark plugs out (tool you need to do it is in your kit). 2 plugs and $10 ish fixed it right up. Could tell when I pulled the plugs one was caked up pretty good. I'd say save your money and give that a shot first before taking it in.