To find it:
1. Consult your owner's manual: This is the best place to start. The manual should have a diagram showing the location of the sensor.
2. Look near the exhaust manifold: The oxygen sensor is usually screwed into the exhaust manifold or the exhaust pipe very close to it. It's placed in a location where the exhaust gases are flowing smoothly and providing a representative sample.
3. It's a threaded sensor: It's a cylindrical sensor with a wire harness connected to it. It's typically about 1-1.5 inches in diameter.
Because there's no single definitive image online for a 1988 Celebrity's O2 sensor location that applies to all models, you need to perform these steps and/or consult a repair manual for the specific engine code in your car. A repair manual specific to your year and engine will show you a detailed diagram. You can find these online or at auto parts stores.
Remember to be careful when working near the exhaust system as it gets very hot. Let the engine cool down completely before attempting to locate or work on the oxygen sensor.
