Heated Oxygen Sensor Replacement - Sensor 2

Fig 1: Heated Oxygen Sensor 2

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
Preliminary Procedures Raise and support the vehicle. Lifting and Jacking the Vehicle { If equipped }. Refer to Front Compartment Insulator Replacement
1	Heated Oxygen Sensor CAUTION: Refer to Component Fastener Tightening Caution . CAUTION: The oxygen sensor uses a permanently attached pigtail and connector. Do not remove the pigtail from the oxygen sensor. Damage to or removal of the pigtail connector could affect proper operation of the oxygen sensor. CAUTION: The use of excessive force may damage the threads in the exhaust manifold/pipe. Procedure Disconnect the heated oxygen sensor harness connector. NOTE: The heated oxygen sensor in-line connector and louvered end MUST be kept clear of all grease, dirt, and other contaminants. Do NOT use cleaning solvents of any type. Do NOT drop or roughly handle the sensor. The heated oxygen sensor MAY be difficult to remove when the engine temperature is less than 48°C (120°F). A special anti-seize compound is used on the heated oxygen sensor threads. The compound consists of 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 sensors will have the compound already applied to the threads. IF a sensor is removed and is to be reinstalled, the threads MUST have an anti-seize compound applied before installation. Tighten 42 N.m (31 lb ft)

Callout

Component Name

Preliminary Procedures

Raise and support the vehicle. Lifting and Jacking the Vehicle
{ If equipped }. Refer to Front Compartment Insulator Replacement

Heated Oxygen Sensor

CAUTION:

Refer to Component Fastener Tightening Caution .

CAUTION:

The oxygen sensor uses a permanently attached pigtail and connector. Do not remove the pigtail from the oxygen sensor. Damage to or removal of the pigtail connector could affect proper operation of the oxygen sensor.

CAUTION:

The use of excessive force may damage the threads in the exhaust manifold/pipe.

Procedure
Disconnect the heated oxygen sensor harness connector.

NOTE:

The heated oxygen sensor in-line connector and louvered end MUST be kept clear of all grease, dirt, and other contaminants. Do NOT use cleaning solvents of any type. Do NOT drop or roughly handle the sensor.
The heated oxygen sensor MAY be difficult to remove when the engine temperature is less than 48°C (120°F).
A special anti-seize compound is used on the heated oxygen sensor threads. The compound consists of 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 sensors will have the compound already applied to the threads. IF a sensor is removed and is to be reinstalled, the threads MUST have an anti-seize compound applied before installation.

Tighten
42 N.m (31 lb ft)