The O2 sensor is located in the exhaust system, just before the catalytic converter. The O2 sensor measures the amount of oxygen in the exhaust gas and helps to control the air/fuel mixture in the engine. If the catalytic converter is removed, the O2 sensor may still function, but it may not be able to accurately measure the amount of oxygen in the exhaust gas. This can cause the engine to run inefficiently and may also lead to increased emissions.
If you are considering removing the catalytic converter from your 1996 Ford Taurus, it is important to weigh the pros and cons carefully. While removing the catalytic converter may save you some money, it can also have negative consequences for the environment and for your vehicle's performance.