Check engine light, code P2181

I have a 2022 Kona. Yesterday, my check engine light came on (steady, not blinking.) A friend was able to check what the problem code is and it is P2181 Cooling System Performance. The car isn't acting in anyway different and the temp gage seems to read everything fine. The problem is I need to do an 8 hour drive tomorrow. We've been on vacation, driving from Chicago to New Orleans to Memphis to Chicago. I would appreciate any useful information as to what might be causing this. Thanks!