Nuvi 660 will not figure a route and states

Haven't heard of this issue but there's a lot of surplus stuff in the memory that can be safely deleted. Try connecting to the computer so you can see the files on the nuvi. Remove a lot of unnecessary voices and text languages. If you need Turkish or whatever in the future it can always be reloaded via the free Garmin WebUpdater. If you don't have WebUpater download it anyway (from the Garmin web site) as it's an easy way to check your GPS has the latest software and bug fixes.