Here recently ambient air temp is starting from 32*F it seems to move up as the session progresses but is about 30-38* delta from IAT1.
20 min session min/max
AAT 32/55
IAT1 70/75

If I unplug the MAF IAT1 goes to -40 as expected.
Where is AAT being sourced from? Do I have a sensor going bad? Old data shows to be pretty close to IAT1.

Does AAT affect VE only motor? Having some weird mid range lean issues that started about the same time.