[DAVB19]

Had my car for two years now, ive had a b and a service done (A was done in sept) but this morning while pulling up to work i got a check coolant level and to look at my manual. Ive never seen this msg before and i plan on seeing if it comes on again during my lunch time when i drive home. What are yalls best recommendations? should i myself check out the coolant level and refill. or should i roll it into the dealer and have them fill it and check it. im no longer warranty so i dont see why they would do this for free.