Where is the cam shaft position sensor on a 1997 ford aerostar van?

The camshaft position sensor (CMP sensor) on a 1997 Ford Aerostar is located on the passenger side of the engine, near the front. It's typically mounted on the cylinder head, close to the camshaft sprocket or gear. You'll likely need to look between the engine and the firewall, possibly partially obscured by other components.

However, the exact location can vary slightly depending on the engine (the Aerostar used a 3.0L V6, but even within that engine there might be minor differences). A repair manual specific to your 1997 Ford Aerostar's engine is highly recommended for pinpoint accuracy. A picture from a repair manual or online forum dedicated to Aerostars will also be very helpful.

Remember to disconnect the negative battery terminal before working near any engine sensors.