HELP intake air temp 492.8deg changed everything!

[LibertyDiesel]

I have a 2019 W9 that has me absolutely lost.
X15, intake air temp randomly jumps to 492.8, its the same every time, and then the Turbo Compressor Outlet Air Temp (calculated) jumps up to 27 thousand degrees, Yes 27k deg.
Truck goes into derate.

I have changed so far,
new ecm, stock file, OEM.
New engine harness OEM
intake temp/pressure sensor OEM tried several
Exhaust gas pressure sensor

ambient air reads correctly.
exhaust gas readings are correct as well.

I have done many other checks including even isolating the intake temp wire from old harness, and grounding it to see what ecm says, and even supplying full 5v and seeing what ecm read.
Never went to 492.8 deg.
Also ran new wire right from intake sensor temp wire, right to the correct pin on ecm, i think 62. That made no change.
Thats when I opted for new ecm and harness.
Im so lost and at this point ive spent so much time and money on stuff I just dont know what else.
Help!