Funny you should mitchen the SOV. I am assuming that is the switch over valve? I replaced the wiring harness app. a month and a half ago and did indeed break the briitle air tube that went to the aforementioned valve. Went to the dealership and they had to special order the tubing. Of course the check engine light came on in the meantime. After replacing the tubing to the SOV the light stayed on for another day or two and then turned itself off.

About a week ago the CE light came on again. I pulled the MAF to see if there was any dirt or build up visible to the naked eye and all looked clean. Reset the CE light so we'll see if it comes back on.

Can the MAF be cleaned with carb or brake cleaner as I think I read somewhere on this forum as a start if the code is thrown again?