Check the IAT sensor and connector make sure the contacts are clean and not damaged or pulled. The sensor can actually be removed from the plenum and inspected. It twists in. Remove the connector first. I would double check each and every connector on that harness there are a few that are down low that can be missed but usually have a different code thrown.
The IAT sensor is passenger side. It is not the hose on the bottom clip, but make sure that is hooked up and didn’t slip off also. Good luck!
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