So sometimes when I start the engine in my Jetta cold (and particularly when it's cold outside too) my coolant warning light will flash, accompanied by a few short beeps. If I shut the car off after it's warmed up and start it up again, I get no such coolant warning.
I've checked the coolant level and it's not low at all, it's perfect. Additionally my temps stay in operating range when I'm driving too. Do I have a sensor going bad maybe?
Speaking of coolant, if it were low where would I get some more? It's pink, I know that, and on the side of the container it indicates i should use G12. I'm assuming it's not alright to fill it with generic "mix with anything" coolant from the auto parts store, correct?
The engine, btw, is just a 2.0L 4cyl.