Navigation system not working properly.
You can try this first…
How to Reboot Your Car’s Infotainment System - Consumer Reports
There is a service bulletin that may be your problem. but you did not give any info on what your problem exactly is.
Use something like Waze, it’s just as accurate, gives more info on traffic, weather, police, road conditions, constantly updates and since you probably already have a smart phone, it’s all FREE.