"Service Engine Soon" Light/CGR Valve

[zlj1989]

Hey everyone. I have had this problem for a few weeks now. It's my "Service Engine Soon" light. It comes on whenever it wants to and I know what the problem is. It's the CGR valve, which was replaced less than a year ago. The mechanics I go to say it might be the valve again or buildup around the valve. I don't want to spend the money to get it replaced again (especially since it wasn't long ago!) so I was wondering if anyone knew of a good product or anything to get that gunk out of there and make my light come off lol! Thanks for all the help!