Navigation is erroring out

Hello, that sounds frustrating to be sure. Although testing is required to determine what is going on, using specialized tools to inspect the system as well as the GPS / Satellite antenna, I would probably first have a physical look at the roof mounted antenna to see if there's a chance it could have been damaged in some way. If it has, it could be malfunctioning for sure, leading to the Navigation unit to get improper information. Still, it is likely you will require professional assistance. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops