To find it precisely, you'll need to:
1. Consult your Aztek's repair manual: This will have diagrams showing the exact location. A Haynes or Chilton manual is a good investment for this type of information.
2. Use a reliable online parts diagram: Websites selling auto parts (like AutoZone, Advance Auto Parts, etc.) often have detailed diagrams that allow you to zoom in and pinpoint the sensor based on your engine type. Enter your vehicle's year, make, model, and engine size. Look for diagrams related to the cooling system.
3. Visually inspect the engine bay: Once you have a general idea from the manual or diagram, carefully examine the engine bay near the thermostat housing. The ECT sensor is usually a single-wire or two-wire sensor with a connector. It's often a relatively small, cylindrical component. Be cautious when working near hot engine parts. Let the engine cool completely before attempting this.
Remember to always disconnect the negative battery terminal before working on any electrical components.
