PO103,P0112,P1161,P1159? whats going on SES light...?

[flekz]

p0103 map or vap a circuit high input?
p0112 IAT sensor 1 circuit low input
p1161 control fuel air metering
p1159 " "

now im looking at this... i called up 2 dealers and there saying that theres no IAT sensor, so im asking myself how is this coming about? then i got 1 dealer saying they got a IAT sensor but dunno where it goes... so in my opinion i think 3 of those codes are culprits from code p0112, so if i get that sensor i think the rest go bye bye... now anyone with a 4.4 ever change the IAT sensor? if so please fill me in on where it goes cause that SES is driving me crazy...