To be certain, you should:
* Consult your vehicle's repair manual: This will have diagrams showing the exact location of the sensor for your specific engine.
* Use a reliable online parts diagram: Many websites (like auto parts stores' websites) allow you to input your vehicle's details and view diagrams showing parts locations.
Looking at the engine visually with the help of these resources will give you the most accurate location. Be careful when working around engine components; always disconnect the battery negative terminal before beginning any work.