To find it with certainty, you'll need to:
1. Consult a repair manual specific to your 2001 Ford Escape 4-cylinder engine. This will have diagrams and precise location information. A Haynes or Chilton manual would be helpful.
2. Use a parts diagram online: Many auto parts websites (like AutoZone, Advance Auto Parts, etc.) allow you to look up parts diagrams for your specific vehicle. Find the engine diagram and locate the CHT sensor.
3. Visually inspect the engine: The sensor is usually a relatively small, single-wire or two-wire sensor with a threaded body. Look carefully near the thermostat housing and along the cylinder head for something that matches that description. Be cautious when doing this. The engine will be hot if recently run.
Caution: Some vehicles might use an Engine Coolant Temperature (ECT) sensor instead of, or in addition to, a CHT sensor. The ECT sensor is often located in the engine coolant passage. The function is similar, but the location and even the name used might vary slightly by year and engine type within the Ford Escape line. Again, your repair manual will clarify this.
