It's usually a small, easily overlooked sensor, often with a single wire connected to it. You'll likely find it by:
1. Locating the air filter housing: Open the hood and find the large rectangular box containing the air filter.
2. Tracing the intake duct: Follow the ductwork leading from the air filter box towards the engine. The IAT sensor is usually mounted somewhere along this duct.
3. Inspecting the duct closely: Look for a small sensor with a single wire connector. It might be clipped to the duct or integrated into a fitting.
It's best to consult a repair manual specific to your 2003 Dodge Caravan's engine type for a diagram and precise location. A Haynes or Chilton manual would be a great help. You can also search online for diagrams specific to your engine using your vehicle's VIN or engine code.
Important Note: Don't confuse the IAT sensor with the Mass Air Flow (MAF) sensor. The MAF sensor is typically located in the intake tube closer to the air filter.