Because of the location and potential for interference, a shop manual or online diagrams specific to your year and engine are highly recommended to pinpoint the exact location visually before you start your search. Searching for "2000 Dodge Caravan 2.4L crankshaft position sensor location" on image search engines (like Google Images or Bing Images) might yield helpful pictures.
Caution: Be careful working around the engine. Hot surfaces, belts, and other moving parts pose risks. Always disconnect the negative battery terminal before working on any sensor.