General 6.0 info
Intake Air #1 IAT1 (just after the air filter) and Intake Air Temp #2 IAT2 (in the manifold) should read within a couple of degrees of OAT (Outside AIr Temp as well.
The sensors circled in blue are the Exhaust Back Pressure (EP), Barometric Pressure (BP) and Manifold Air Pressure (MAP).
The ones in green are the air intake temp, Engine Oil temp and the Air Temps sensors.
All these sensors take part in the Fuel management system. They feed the sensor data to the PCM which them tells the FICM what to do with the injectors. So making sure the sensors are good and sending the correct info to the PCM are important as well.
It might look a little confusing at first, but after a while it becomes much easier......



