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It's an old thread but I am posting this here as well for those trying to set the right parameters to follow on their gauges:
IAT1 = Temperature measured at the MAF sensor (real data)
IAT2 = There is no IAT2 sensor, it is a calculated value derived from ECT and IAT1 (not real data)
IAT3 = MAT (real data) - PID used for blower temperatures
So it seems that it makes sense to monitor IAT1 and IAT3 (MAT). I don't see any use of monitoring IAT2, unless I am missing something.
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Red Hot 2020 Camaro ZL1 A10 <-- Enjoying the hell out of it
Mosaic black 2018 Camaro 2SS A8 (sold)
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