It's usually located near the front of the cylinder head, either on the top of the cylinder head itself or on the valve cover near the front. It's a fairly small sensor, often with a single electrical connector.
To be certain:
1. Consult your vehicle's repair manual: This is the most accurate source for the exact location on your specific year and model.
2. Use a reliable online parts diagram: Websites like AutoZone, Advance Auto Parts, or RockAuto allow you to select your year/make/model and view diagrams showing the sensor's position.
Because you're working on a vehicle's engine, it is extremely important to be absolutely sure of the correct sensor location before attempting any repairs. Incorrect identification could lead to further engine damage or injury.