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Home › Pontiac › 2001 › Aztek Base, AWD › Repair and Diagnosis › External Pages › Different car › Section 1681 (Engine Controls And Fuel - 2.4L - Introduction) › Repair Instructions › Heated Oxygen Sensor Replacement - Sensor 1 › Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: A special anti-seize compound is used on the heated oxygen sensor threads. The compound consists of a liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the heated oxygen sensor easier to remove. New or service replacement heated oxygen sensors will have the compound applied to the threads. If a heated oxygen sensor is removed and is to be reinstalled without replacement then the threads must have an appropriate anti-seize compound applied prior to installation.
    Fig 1: HO2S
    GM1631780Courtesy of GENERAL MOTORS CORP.
  1. If necessary, coat the threads of the HO2S with anti-seize compound Saturn P/N 21485279 or equivalent.
    2. CAUTION: Refer to Fastener Caution .
  2. Install the HO2S using wrench J 39194-C  . See Special Tools .

    Tighten:  Tighten the sensor to 42 N.m (31 lb ft).

  3. Install the HO2S electrical connector to the thermostat housing.
  4. Connect the engine wiring harness electrical connector to the HO2S electrical connector.
  5. Install the CPA tab to the HO2S electrical connection.
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