Firebird V8-350 5.7L VIN P SFI (1996)
Heated Oxygen Sensor: Description and Operation
Rear Heated Oxygen Sensors (HO2S)
The catalyst monitor sensors operate the same as the fuel control sensors. Although the Bank 1 HO2S 2 and Bank 2 HO2S 2 sensors main function is
catalyst monitoring, they also play a limited role in fuel control. If a sensor output indicates a voltage either above or below the 450 millivolt bias voltage
for an extended period of time, the PCM will make a slight adjustment to fuel trim to ensure that fuel delivery is correct for catalyst monitoring
