Heated Oxygen Sensor Replacement - Bank 1 Sensor 1

Fig 1: Heated Oxygen Sensor - Bank 1 Sensor 1

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
Preliminary Procedure Remove the fuel injector sight shield.
1	Heated Oxygen Sensor CAUTION: Refer to Heated Oxygen and Oxygen Sensor Caution . CAUTION: Refer to Fastener Caution . Procedure Disconnect the heated oxygen sensor harness connector. If reinstalling the old sensor, coat the threads with anti-seize compound. NOTE: A special anti-seize compound is used in the HO2S threads. The compound consists of liquid graphite and glass beads. The graphic tends to burn away, but the glass beads remain, making the sensor easier to remove. New, or service replacement sensors already have the compound applied to the threads. If the sensor is removed from an exhaust component and if for any reason the sensor is to be reinstalled, the threads must have anti-seize compound applied before reinstallation. Tighten 42 N.m (31 lb in)

Callout

Component Name

Preliminary Procedure
Remove the fuel injector sight shield.

Heated Oxygen Sensor

CAUTION:

Refer to Heated Oxygen and Oxygen Sensor Caution .

CAUTION:

Refer to Fastener Caution .

Procedure

Disconnect the heated oxygen sensor harness connector.
If reinstalling the old sensor, coat the threads with anti-seize compound.

NOTE:

A special anti-seize compound is used in the HO2S threads. The compound consists of liquid graphite and glass beads. The graphic tends to burn away, but the glass beads remain, making the sensor easier to remove. New, or service replacement sensors already have the compound applied to the threads. If the sensor is removed from an exhaust component and if for any reason the sensor is to be reinstalled, the threads must have anti-seize compound applied before reinstallation.

Tighten
42 N.m (31 lb in)