[cbakking]

My coolant expansion tank finally gave away, pool of coolant around driver side front wheel, with carbonM's direction I was able to replace it with ease... but now I've gotten CEL? started with warning message "Please tighten the gas cap" while I was driving so pulled over double checked the gas cap and it was fine and continue to dive then CEL came up along with warning message "Please tighten the gas cap".....
Now I wonder it could be simple as old gas cap - easy fix- but wonder if coolant leak somehow damaged EVAP valve? any help would be appreciated!