Heated Oxygen Sensor Replacement - Bank 2 Sensor 1

WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.

Courtesy of GENERAL MOTORS COMPANY

NOTE: Callouts in the following chart represent components shown in graphic above.

Callout	Component Name
1	Heated Oxygen Sensor WARNING: In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool. WARNING: Avoid contact with HOT components. Wear safety glasses and protective gloves to avoid personal injury. CAUTION: Refer to Component Fastener Tightening Caution . CAUTION: Refer to Heated Oxygen and Oxygen Sensor Caution . CAUTION: Refer to Heated Oxygen Sensor Resistance Learn Reset Caution . CAUTION: The use of excessive force may damage the threads in the exhaust manifold/pipe. 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. Adhesives, Fluids, Lubricants, and Sealers Procedure Lifting and Jacking the Vehicle Disconnect the electrical connector. Perform the HO2S heater resistance learned values reset. HO2S Heater Resistance Learned Values Reset Tighten 42 N.m (31 lb ft) Special Tools EN-6179 Heated Oxygen Sensor Remover/Installer Equivalent regional tools: Special Tools

Callout

Component Name

Heated Oxygen Sensor

WARNING:

In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.

WARNING:

Avoid contact with HOT components. Wear safety glasses and protective gloves to avoid personal injury.

CAUTION:

Refer to Component Fastener Tightening Caution .

CAUTION:

Refer to Heated Oxygen and Oxygen Sensor Caution .

CAUTION:

Refer to Heated Oxygen Sensor Resistance Learn Reset Caution .

CAUTION:

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

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. Adhesives, Fluids, Lubricants, and Sealers

Procedure

Lifting and Jacking the Vehicle
Disconnect the electrical connector.
Perform the HO2S heater resistance learned values reset. HO2S Heater Resistance Learned Values Reset

Tighten
42 N.m (31 lb ft)
Special Tools
EN-6179 Heated Oxygen Sensor Remover/Installer
Equivalent regional tools: Special Tools