check your gas cap - you can take it to an auto parts store and they can pressure check it. If it is your gas cap, replace it. It may take a few days for the code to clear or you can reset by disconnecting the battery ground cable for about 15 minutes.
do the steps in the write up again, it's important not to go beyond the "On" position or you'll need to turn it off and start again.
do the On/Off in a smooth series, no need to pause from one to the other. The write up instructions work, I've done it on my 2010