I just want to attempt to kill off some Internet myths again. Cleaning IAT sensor WILL NOT improve engine performance or fix any engine problems.

 

 

This right here is an IAT sensor for 98.5 to 02 Dodge Cummins 24V engine. This sensor has about 50k miles of gunk on it. This has ZERO impact on the sensor ability to read air temperature in the manifold. Cleaning the sensor will do nothing for performance or MPG. The way to check the IAT sensor for problems is with a live data tool like OBDLink, ScanGauge II or even the Quadzilla Adrenaline. Now at first key on of the day take note of the coolant and the IAT temperatures. They should match if they do nothing needs to be done. If the don't match then the IAT sensor will most likely need to be replaced not cleaned. When doing this testing make sure the block heater is not plugged in for that night. 

I cleaned mine once about 180k ago trying cure a problem and it did not help. Have not touched it since. Have not even seen since then. 

I also cleaned mine with no improvement afterwords 

37 minutes ago, Evan said:

I also cleaned mine with no improvement afterwords 

 

No reason to clean the IAT or MAP sensor. It's an internet Myth. Being I created the IAT fooler for MPG's and proved time and time again that IAT temperature of 100-140*F is optimal. Cold air degrades MPG performance. Cleaning the sensor will not change the reported temperature nor fix any error codes. To check IAT performance just plug in a live data tool verify the temperatures report by IAT and ECT are the same at first key on in the morning.