Firebird V8-305 5.0L (1982)
Oxygen Sensor: Description and Operation
The oxygen sensor--mounted in the exhaust system ahead of the catalytic converter--provides a varying DC voltage to the ECM representing the
oxygen content of the exhaust gas.
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When the fuel mixture is lean sensor voltage is low--under 0.2 volts--.
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When the fuel mixture is rich sensor voltage is high--up to 1 volt--.
The ECM uses these signals to control Mixture Control (MC) solenoid operation.
NOTE: Voltage signals are not supplied by the sensor until exhaust temperature reaches 600° F.
