To find it, I strongly recommend:
* Consulting a repair manual specific to your 2000 Dodge Caravan 3.3L: This will have diagrams and precise locations. A Haynes or Chilton manual would be helpful.
* Using an online parts diagram: Many auto parts websites (like AutoZone, Advance Auto Parts, etc.) allow you to look up your vehicle and see diagrams showing the location of parts. Search for your vehicle year, make, model, and engine.
Looking directly at your engine with the oil filter visible will greatly aid you in locating this sensor. It's usually fairly accessible. Be aware that it might be slightly difficult to see, depending on other components around it.