Location of o2 sensor 98 Chevy astro van?

The location of the O2 sensor(s) on a 1998 Chevy Astro van depends on the engine. There are typically one or two, located in the exhaust system downstream of the catalytic converter(s). To be certain, you need to know your engine type (4.3L V6 or possibly a different engine if it's a less common model).

To find the location:

1. Consult your owner's manual: This is the best resource. It should have a diagram showing the location of all sensors.

2. Use a repair manual: A Haynes or Chilton repair manual specific to your 1998 Chevy Astro van will show diagrams and detailed instructions.

3. Check online resources: Websites like AutoZone, Advance Auto Parts, or others that sell auto parts often have diagrams and information about sensor locations based on vehicle year, make, and model, and engine. You may need to enter your VIN (Vehicle Identification Number) for the most accurate results.

4. Visually inspect the exhaust system: With the engine cool, look under the van near the catalytic converter(s). O2 sensors are usually threaded into the exhaust pipe. They look like threaded cylindrical metal parts with a wire harness connected to them. Be cautious when inspecting under the vehicle. Use jack stands and safety precautions.

Important Note: Because there might be multiple O2 sensors (one before and one after the catalytic converter), specifying your engine size is crucial for accurate location information.