Do the 06's have that particular sensor? Last time I seen one was on an 02 and it looked sort of like an oxygen sensor. TIA!

 

 

I suppose this will help. It's on the intake side, somewhere by the MAP sensor.

 

On 03-current CR Cummins the IAT (intake air temp) sensor is in the intake tube going to the front of the turbo. The MAP (manifold absolute pressure) sensor also has an intake temp function to help correct the absolute air pressure for altitude and boost formulation which is why it's called absolute instead of relative. It helps to measure the density of the air for actual altitude/pressure.