P0440 Dodge -

Question

I already changed the gas cap &' it still has the check engine light . I don't know what else I could to fix it. The truck is a 2007 dodge.

Answer 1

Hi there,

This is a very broad code for testing. You need to have the vehicle smoke tested for leaks. If none are found then each item on the evap system will have to be tested to find which one is bad. If there is another code showing with this one, then work that code first.