I put in a new battery the other day and since then my car shuts off everytime i start it. i Checked my alternator and its working fine. I have no error codes......I don't know whats going on i think its a syncing issue....help

 

Sounds like you blew a fuse.. somewhere.. the intelligent fuse panel is behind the battery.. did you bump that? Did you clean out the battery area with soap & water?
How are the battery connections? You do know the main battery terminal ( positive ) has 4 or 5 fusible links built in..?

Mike