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Heated Oxygen Sensor: Installation

WARNING: This page is about a different car, the 2002 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Silicone based products will contaminate the HO2S. Use only a nickel based anti-seize compound that does not contain silicone. Do not apply any material in the HO2S harness connector such as grease or dielectric compound.

Apply a small amount of Anti-Seize Compound (21485279) to the threads of the HO2S. Using Heated Oxygen Sensor Wrench (J39194C), install the HO2S. Tighten the HO2S to specification. See TORQUE SPECIFICATIONS  . Install sensor harness and connector to the attachment clip. Connect the HO2S harness connector. Push in connector until a click is heard, then pull back to confirm a positive engagement.



CAUTION: Silicone based products will contaminate the HO2S. Use only a nickel based anti-seize compound that does not contain silicone. Do not apply any material in the HO2S harness connector such as grease or dielectric compound.
  1. Apply a small amount of Anti-Seize Compound (21485279) to the threads of the HO2S. Using Heated Oxygen Sensor Wrench (J39194C), install the HO2S. Tighten the HO2S to specification. See TORQUE SPECIFICATIONS  .
  2. Install sensor harness clip to the heat shield attachment bolt. Connect the HO2S harness connector. Push in connector until a click is heard, then pull back to confirm a positive engagement. Ensure the HO2S harness pigtail is secured to the chassis.


CAUTION: Silicone based products will contaminate the HO2S. Use only a nickel based anti-seize compound that does not contain silicone. Do not apply any material in the HO2S harness connector such as grease or dielectric compound.

Apply a small amount of Anti-Seize Compound (21485279) to the threads of the HO2S. Using Heated Oxygen Sensor Wrench (J39194C), install the HO2S. Tighten the HO2S to specification. See TORQUE SPECIFICATIONS  . Connect the HO2S harness connector. Push in connector until a click is heard, then pull back to confirm a positive engagement. Start engine and ensure no exhaust leaks exist.

Fig 1: Locating Engine Control Components (3.0L - Bank 1 Is Shown)
G00134178Courtesy of GENERAL MOTORS CORP.


CAUTION: Silicone based products will contaminate the HO2S. Use only a nickel based anti-seize compound that does not contain silicone. Do not apply any material in the HO2S harness connector such as grease or dielectric compound.
  1. Apply a small amount of Anti-Seize Compound (21485279) to the threads of the HO2S. Using Heated Oxygen Sensor Wrench (J39194C), install the HO2S. Tighten the HO2S to specification. See TORQUE SPECIFICATIONS  .
  2. Lower vehicle. Connect the HO2S harness connector. Push in connector until a click is heard, then pull back to confirm a positive engagement. Start engine and ensure no exhaust leaks exist.
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