On a 1994 Pontiac Sunbird 3.1 where is the camshaft sensor?

The camshaft position sensor (CMP sensor) on a 1994 Pontiac Sunbird with the 3.1L V6 engine is located on the passenger side (right side) of the engine, near the front of the cylinder head. It's usually mounted on the cylinder head itself, and points towards the crankshaft pulley. You'll likely see a single-wire connector attached to it.

Because exact placement can vary slightly depending on specific engine variations, it's best to consult a repair manual specific to your 1994 Pontiac Sunbird 3.1L. A Chilton's or Haynes manual will have diagrams and precise locations. You can also search online for images of the 3.1L engine in that year Sunbird; a visual reference will be helpful.