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Home >> Eagle >> 1989 >> Premier ES >> Repair and Diagnosis >> Engine Performance >> System >> 3.0L Systems/Tests W/Codes >> Operation >> Heated Oxygen (O2) Sensor

Heated Oxygen (O2) Sensor

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The O2 sensor supplies an input voltage to the ECU. The ECU uses this information to vary air/fuel ratio. Voltage is supplied to the O2 sensor through the ignition relay.