Chrysler Pacific 2006, Does anyone know why?

Check battery voltage, should be minimum 12.4vdc. If voltage is below, charge or replace battery, if ok, check battery cables for corrosion and make sure they're tight

If battery and cables are OK and connections are good and it still just clicks,check starter relay in the fuse box ( under the hood next to the battery). If that relay is good then it's probably the starter. It's not easy to get to but can be done by an experienced mechanic