A 2001 Ford Escape has a 2.0L or a 3.0L V6 engine. The 2.0L is a 4-cylinder engine and therefore only has four spark plugs.
The 2001 Ford Escape with the 3.0L V6 engine has six spark plugs. They are arranged in two banks of three, on either side of the engine. There isn't a single "sixth" spark plug location that's universally described – the location depends on which side of the engine you're looking at (looking at the engine from the front of the vehicle).
To find the sixth spark plug, you'll need to consult a repair manual specific to your 2001 Ford Escape 3.0L V6. A repair manual (either physical or a digital version) will have diagrams showing the precise location of each spark plug. It will be much easier to identify them with a visual guide.
