Question

My 2007 Dodge Ram 1500 shows the codes P0456 & P0455, where should I begin?

Answer 1

You could start by inspecting the gas cap. Check the cap and make sure is not damage. If the gas cap is OK check for damage EVAP canister.

P0456 DODGE - EVAP System Small Leak

Read more: https://www.autocodes.com/p0456_dodge.html

P0455 DODGE - EVAP System Large Leak

Read more: https://www.autocodes.com/p0455_dodge.html