hi there everyone,
i did that Code test through the Odometer and it gave me Code 0456(P0456 Evaporative Emission Control System EVAP LEAK MONITOR SMALL (.020") LEAK DETECTED)
what does this mean? Fuel Cap loose?
thank you !!
DAN

 

yeah check the feul cap first and if still does not go of check your vacuum lines that go back too the feul tank. Also inspect all the lines that connect too the evap canister.
I was trowing that code and it turned out that one of the hoses on the evaP canister was leaking

 

I have a Dodge Durango 2002, 4.7. I had the same problem, first tried replacing the gas cap. It ended up being a leak in the vacuum lines.

 

0456 is a small leak. Normally small leaks are not the gas cap. I you are in an emissions state go have it smoke checked and repai the offending part that is leaking.