Thanks for this! I had been getting code P0456 for a while of and on, took to dealer a while back and they diagnosed it and wanted over $300 to fix. At least they didn't charge me for a diagnosis, since the just replaced the long block... Took the quote home and ordered the part number from Rock Auto, which was none of these listed and when it came in, I did a reverse search and find. It was the valve on the canister under the rear of the car. Still get the code now and then, especially when it sits on hot days.
Just looked under the hood and those pics match what i have! I was having issues finding the right part for my 2011 Flex EB too. I will order this part and see if that fixes it.