However, without a visual reference (like a repair manual or a picture of your specific engine), pinpointing the exact location can be difficult. Accessing it will likely involve removing the lower engine cover or other components to get a good view. It's a relatively small sensor with a single wire connector.
I strongly recommend consulting a repair manual specific to your 1993 Oldsmobile Cutlass Supreme 3.4L. This will give you precise diagrams and instructions to locate and replace the sensor safely. A Haynes or Chilton manual would be a good source. Using a visual guide will be far safer and more efficient than guessing its location.