Envoy 2WD V8-5.3L VIN M (2005)
Oxygen Sensor: Service and Repair
Heated Oxygen Sensor (HO2S) Replacement Bank 1 Sensor 1
HEATED OXYGEN SENSOR (HO2S) REPLACEMENT BANK 1 SENSOR 1
REMOVAL PROCEDURE
1. Unscrew the heated oxygen sensor (HO2S) sensor from the catalytic converter.
NOTE:
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Refer to Heated Oxygen and Oxygen Sensor Notice in Service Precautions.
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Refer to Excessive Force and Oxygen Sensor Notice in Service Precautions.
2. Remove the catalytic converter.
3. Remove the connector position assurance (CPA) retainer.
4. Disconnect the heated oxygen sensor (HO2S) electrical connector (3).
INSTALLATION PROCEDURE