Remove your center console, exposing the shifter.



The shifter linkages circled in pink have a 'narrow' black plastic covering. The black plastic covering on the left (see pic) may have loosened it-self out of place. Just push it back into the shorter black plastic mount. Push really really hard! You should hear it snap back into place. Good luck dude.

EDIT: Btw the pic is from a 1g but it is very simliar to the 2g shifter layout.