To be certain, you'll need to:
* Consult your owner's manual: This is the best source for the precise location.
* Use a repair manual or online diagrams: A Haynes or Chilton manual for your specific year Ranger will show you a diagram of the engine bay. Online resources like auto parts websites (e.g., Advance Auto Parts, AutoZone) often have diagrams you can access if you enter your vehicle's information.
Look for the sensor near the throttle body and upper intake plenum. The vacuum hose connection is a good visual clue. If you are still having trouble finding it, a picture of your engine bay could assist someone in helping you locate it.