Having this issue as well. 2012 GT. p0455 and p0456.
Changed the gas cap, cel cam back on.
OEM Solenoid valve for 2012 part# number is LF8218740
A generic version can be found here...
https://www.amazon.com/dp/B0114D089Y/?tag=m20b7-20
are these the parts you are talking about?
Anyone want...