GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Epica 🢒 Preface 🢒 Cautions and Notices 🢒 Heated Oxygen Sensor Replacement - Bank 1 Sensor 2

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 1265317 Size: SH
  1. Disconnect the negative battery cable.
  2. Disconnect the electrical connector.

    3. Object Number: 1265321 Size: SH
  3. Remove the heated oxygen sensor.

Installation Procedure

    Important: A special anti-seize compound is used on the oxygen sensor threads. This 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 serviced sensors will already have the compound applied to the threads. If a sensor is removed from any engine and is to be reinstalled, the threads must have an anti-seize compound applied before reinstallation.

  1. Coat the threads of the HO2S with an anti-seize compound, if needed.

    2. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1265321 Size: SH
  2. Install the heated oxygen sensor.

    3. Tighten
    Tighten the heated oxygen sensor to 44 N·m (33 lb ft).


    Object Number: 1265317 Size: SH
  3. Connect the electrical connector.
  4. Connect the negative battery cable.