I have had a check engine light on in my '03 Durango 5.9L 4x4 foir 2 years now. Been in shop numerous times. Code is P0455 which is an EVAP code. Nobody has been able to locate a vacuum leak thus far. Initially we were toisd gas cap needed replaced. It was replaced and light still on. Most recently has downstream O2 sensor replaced and light reset. Light came on 100 miles later. HELP, I'm sick of looking at this light!

 

check the hoses going to the evap canister under the truck (about even w/t he drivers seat), and follow those hoses everywhere, they tend to crack over time and cause this light. also be sure to check where they go over the engine as they crack there too.

 

Should I just look and feel or is there a way to check them with smoke or anything?

 

Just do a visual and feel them. They tend to dry rot and split . I did one on my wifes D and one on my Ram. Both underneath the vehicles near the gas tanks.

 

yea a visual inspection covers it just fine, if its bad you should see/feel a crack