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Home >> American Motors >> 1982 >> Spirit Base, 2D Hatchback, 2.5L Eng VIN B, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Computer Controlled Catalytic Converter >> Operation >> Data Sensors >> Oxygen Sensor

Oxygen Sensor

This sensor is mounted in engine exhaust stream. It supplies a low voltage (under 1/2 volt) when fuel mixture is lean (too much oxygen) and a higher voltage (up to 1 volt) when fuel mixture is rich (not enough oxygen). Oxygen sensor must be hot (over 600°F) to function properly and to allow ECM to accept its electrical signals. The oxygen sensor measures quantity of oxygen only.

To ensure proper functioning of oxygen sensor, it must be replaced every 30, 000 miles. An "EMISSION MAINTENANCE" lamp on the instrument panel will glow at the appropriate time.

NOTE: No attempt should be made to measure oxygen sensor voltage output. Current drain of conventional voltmeter could permanently damage sensor, shift sensor calibration range and/or render sensor unusable. Do not connect jumper wire, test leads or other electrical connectors to sensor. Use these devices only on ECM side of harness after disconnecting from sensor.
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