here's the MAF, or MAP is really what it is - manifold absolute pressure. the MAF is a flow sensor found on older cars, it has been made obsolete by the MAP. my mistake on labeling it the MAF, but you get the idea.
your engine will probably look different, but its in the same basic location. on the front middle of the intake plenum.
secondly please please get yourself on www.hmaservice.com
. you must use IE, get a free account to log in with (like these forums) and download the necessary plugins under site requirements. there is troubleshooting information there along with service info/procedures for your error code. its under the DTC link along the top, may have to hit the link for "Shop" first cant remember.
finally, autozone are being idiots. weather the light is on or not **the ECU stores the code**. there are even some codes that do not throw a light but the ECU will still store. only way to get rid of them is to either clear with a code reader or disconnect your battery for a few minutes.
without that error code, there isn't much anyone can do but take a shot in the dark. if places like autozone are giving you hassle, i would invest in a code reader. they're not that expensive like they used to be - i bought a rather nice one for $150 CAN on sale (i'm up in canada) and there are cheaper ones. those ones only give you the code and the ability to erase it - no other data. however, drop that code into google or look it up on HMA and you will have your answer. the better ones just give some more information is all - most of the time you don't need it, just nice to have is all.