If you experience problems with SYNC®, you can perform a master reset. This process erases all stored data, such as call history, text message information, and previously paired phones, and restores your system to factory settings.27
There are a few things you should do before starting step 1:
Press the Aux button to select SYNC.
Press the Menu button.
Scroll to System Settings and press OK.
Use the Seek buttons to find Advanced and press OK.
Use the Seek buttons to find Master Reset and press OK.
SYNC displays, “Confirm Reset?” Press OK to reset your system.