Where is the O2 sensor located on an 1989 Chevy Celebrity 2.8 with fuel injection?

On a 1989 Chevy Celebrity 2.8L with fuel injection, the oxygen sensor (O2 sensor) is typically located in the exhaust manifold, before the catalytic converter. There's usually only one on these models. You'll find it on one of the exhaust pipes, likely near the engine, but precise placement can vary slightly depending on the specific engine configuration.

To be certain, you should:

* Consult a repair manual: A Haynes or Chilton manual specific to your 1989 Chevy Celebrity 2.8L will have a diagram showing the exact location. This is the most reliable method.

* Look under the car: Once you're under the car, look for a wire leading from a sensor in the exhaust manifold area. The sensor itself is usually threaded and screwed into the manifold.

Remember to be careful when working under the car, and let the exhaust system cool completely before attempting any inspection or repair.