Where the o2 sensor located on a 1986 Oldsmobile Delta '88?

On a 1986 Oldsmobile Delta '88, the oxygen (O2) sensor is typically located in the exhaust system, either in the exhaust manifold or just downstream of it, before the catalytic converter. To access it, you may need to raise the vehicle for better visibility. The sensor is usually threaded into the exhaust pipe and can be identified by its electrical connector.