Check engine light code 0456

I replaced the gas cap light is still on guy at the AutoZone SD might have to drive it about 50 to 100 miles will go out eventually.

 

Did you try resetting the code first? If the new gas cap doesn't solve your issue, I'd have an actual EVAP test done before you throw any more money into the parts cannon.

 

Disconnect the negative battery cable for a minute then reconnect. Light will be cleared.

Your AutoZone guy should have offered to plug in their scan tool and clear the code for you

 

I believe AutoZone usually just uses basic scan tools that can't clear the codes. They've never cleared mine in the past, anyway.