New York Mustangs
wakester06v6
Did they tell you specifically what was not ready?, do you have a custom tune?, recently disconnect the battery? There are a lot of factors that need to be looked at before we can diagnose it.
wakester06v6
the P0456 code comes back as an evap system leak. replacing the gas cap was step 1, you may have to have the fuel pump replaced, and or have a smoke test performed at a dealership to track down a vacuum leak. That's the best info I have for you, maybe someone else here has some more to add.
wakester06v6
The only other thing it may be is a nick, crack or cut in a vacuum hose on The evap system. The dealership isn't going to find it unless they are looking for it, and then only if you are paying them to look for it.
wakester06v6
Anytime, Good Luck! :D
wakester06v6
So, here is a twist. You have a custom tune. It is possible that certain sensors (O2) have been shut off in the tune program that will show as a Not Ready. Going back to a stock tune should correct that. I would also follow the directions on this link to properly reset all the monitors: [url]http://www.obdii.com/drivecycleford.html[/url]
TDHJSilver06
That code might also be the vapor canister purge valve. Changed out the one on my Explorer and it cleared for inspection last month.
TDHJSilver06
I thought that once you reached a point they would pass it. Thought I heard it being a dollar amount of $400, but then the next year if it happens it must be fixed.