Code P0456

My jeep giving a code of
P0456.
ALSO LEAKING SOME OIL.
I NEED HELP

 

What Does the P0456 Code Mean?
The P0456 is a generic code stating that the Engine Control Module (ECM) detected a small leak from the evaporative system. This leak was detected during a self-test. For the code to come on, the test must fail two times in a row before the Check Engine Light comes on.

 

Thank you, I am not understanding what this means.

 

Will the gas mileage also go down? Was getting 23 mpg now 17.
I had the code cleared so I could remotely start my jeep, but I know I need to get it fixed.

 

SORRY. I’m not much help hopefully someone will chime in. I just thought it was a generic code.

 

No problem. Thank you

 

In addition to post #2 try some inexpensive steps: inspect your gas cap, tighten firmly with a few more clicks each fillup, clean gas cap gasket and filler neck with some WD40 on a rag, replace with new OEM cap. If you're lucky PO456 could be triggered by a loose or loose fitting gas cap.
p.s. many auto parts store can read/clear the code temporarily until problem is resolved

 

Thanks. Does not have a gas cap.
Capless. Does have a little rubber seal.

 

That’s too bad as a new OEM gas cap resolved a similar code on my old Avalon

 

So lights off. Filled gas tank,
I will see what happens..
Thank you

 

I wonder if there was something in way not letting the rubber to seal

 

Yea not sure. Guess see what happens.
Cross my fingers.