i get a code of p0452 on my 2006 dodge dakota, where is it located?

Question

This is causing too much pressure in the system and in the tank.

Answer 1

P0452 NLVD pressure switch stuck closed

This is correct this will cause pressure in the fuel tank, you would also need to know that the fuel cap has the capability of releasing pressure when there is too much pressure in the fuel tank. The fix here is the NLVD pump that is located on the evap canister