P0456 fault code 2002 3.9L

I got a fault code P0456 2002 dakota 3.9L I checked the obvious gas cap vac/vent lines nothing found do i need a special device to
remove the fault code or can i just remove the battery for a few minutes and see if the code comes back. are there any other items i could check??
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.