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Home >> Eagle >> 1990 >> Premier ES >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Input Devices >> Heated Oxygen (O2) Sensor
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Heated Oxygen (O2) Sensor

The O2 sensor is located in the exhaust pipe. The O2 sensor supplies 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 ON relay.