I found another way for the code to be thrown that I havent seen anyone give as a solution to the P0100 code. Look at the part of the MAF where the plug gets plugged in at and make sure none of the metal contacts in there are bent. My car has been throwing this code for months and I couldnt figure out why. I look at it tonight and found that was the problem. The SES light went out as soon as I fired it up. Just thought I'd let you all know and maybe it'll fix someone's problem.