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Home >> Geo >> 1995 >> Metro Base, 2D Hatchback >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - 1.0L 3-CYL >> Computerized Engine Controls >> Engine Sensors & Switches >> Heated Oxygen Sensor (HO2S)

Heated Oxygen Sensor (HO2S)

  1. A malfunction in the HO2S circuit will set a related DTC 13. For testing procedures, see TESTS W/CODES - 1.0L 3-CYL article. Use following procedure to test O2S.
  2. A voltage is produced in response to amount of Oxygen in exhaust gases. A lean mixture (high oxygen content) will produce a low voltage of approximately 0.1 volt. A rich mixture (low oxygen content) will produce a high voltage of approximately 0.9 volt.
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