How is your car running?
I had both of those codes (not de-snorkeled) which may or may not mean the MAF is bad, the only way to know for sure is to have it hooked up and tested at your dealer or other shop that has the right hardware to check.
I have replaced the MAF, AOS, and cleaned my throttle body. Codes have not reappeared, however, I have found a vacuum leak in one of the rubber sleeves beyond the throttle body which is causing a rough idle and code P0507. Vacuum leaks are common and the cause of many issues related to the normal running of our cars, you may want to have the MAF tested before investing in something that may not be bad.
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'06 Cayman 'S' - Sold (Sport Chrono, PASM, TPMS, 19' CAS Wheels, NAV)
'06 Cayenne - Sold
'01 Boxster 'S' - Sold
'00 Boxster - Sold
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