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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Controls - 2.4L - Introduction (2 Of 2)) >> Repair Instructions >> Heated Oxygen Sensor Replacement - Position 2 >> Installation Procedure

Installation Procedure

WARNING: This page is about a different variant/trim than selected.
IMPORTANT: 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 sensor easier to remove. New or service replacement sensors will have the compound applied to the threads. If a sensor is removed and is to be reinstalled, the threads must have an anti-seize compound applied prior to installation.
    Fig 1: Identifying HO2S
    GM1650820Courtesy of GENERAL MOTORS CORP.
  1. If necessary, coat the threads of the HO2S with anti-seize compound Saturn P/N 21485279 or equivalent.
    2. NOTE: Refer to Fastener Notice .
  2. Using the J 39194-C  , install the HO2S.

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

    3. Fig 2: Identifying Wheel Drive Shaft Heat Shield
    GM1650818Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Use care when securing the HO2S electrical lead into the trough on the exhaust heat shield, as not to pinch the lead.
  3. Bend the heat shield trough (2) up until the HO2S lead (1) is secured.
  4. Install the wheel drive shaft heat shield. Refer to Wheel Drive Shaft Heat Shield Replacement .
  5. Lower the vehicle.
    6. Fig 3: Identifying Engine Harness Electrical Connectors
    GM1648166Courtesy of GENERAL MOTORS CORP.
  6. If equipped with RPO M86, perform the following steps, connect the HO2S connector lead to the engine harness electrical connector (5).
  7. Install the CPA retainer (4).
    8. Fig 4: Identifying Engine Harness Electrical Connectors - Top Of Engine
    GM1647986Courtesy of GENERAL MOTORS CORP.
  8. If equipped with RPO MN5, perform the following steps, connect the HO2S electrical connector lead to the engine harness electrical connector (4).
  9. Install the CPA retainer.
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