LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Pontiac >> 2004 >> Aztek Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 199 (Engine Control System 3.4L (Introduction)) >> Repair Instructions >> Heated Oxygen Sensor Replacement - Position 2 >> Removal Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Removal Procedure

WARNING: This page is about a different car, the 2004 Chevrolet Monte Carlo and 2004 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
    IMPORTANT: The heated oxygen sensor (HO2S) 2 may be difficult to remove when engine temperature is less than 48°C (120°F). Excessive force may damage the threads in the exhaust pipe.
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Disconnect the heated oxygen sensor (HO2S) 2 electrical connector.
  3. Use the J 39194-B  to remove the HO2S 2. See Special Tools and Equipment .
  4. Fig 1: View Of HO2S 2
    GM10975Courtesy of GENERAL MOTORS CORP.