Getting a bit colder so this all may actually have coincided with having the heat on for the first time in many months. The coolant light came on briefly (~60 seconds) and then went away a few days ago. Same situation today.
I checked the level after the car had cooled off and the floating gauge pops right to the top so doesn't appear low. I'm aware there is a bleed screw of sorts right by the coolant cap, so do I need to open that up to get a true read of coolant level?
Thanks