GM 19209807
Oxygen Sensor

To replace the heated Oxygen Sensor (HO2S), locate the Oxygen Sensor electrical connector by disconnecting it and do not apply too much pressure that might damage the threads in the Exhaust Manifold /pipe. If the engine temperature is below 48oc (120oF) then the Oxygen Sensor will tend to become hard to remove, one should ensure that the engine of the opa has been properly been warmed up. Then, take away the heated Oxygen Sensor. On the installation of the new or reused sensor apply an anti-seize compound; item part number 5613695, or an equivalent, to the threads if not already pre-applied. Remove the round punch from the ho2s package and install it to 1 to 42 n.m, (31 lb ft) and reconnect the Oxygen Sensor electrical connector. Treat the ho2s and the o2s gently, ensuring the in-line electrical connector and the louvered end of both parts are free of grease, dirt, or other type of contamination and refrain from using cleaning solvents or dropping the sensors.

To change the heated Oxygen Sensor (HO2S) you need to obtain the required tools; these are the Oxygen Sensor wrench (J 39194). Start with an intake manifold cover removal and separating the engine harness electrical connector from the ho2s pigtail. Next you will take the ho2s pigtail clip off the sight shield bracket, lift and position the vehicle. It is recommended to take out the ho2s if engine temperature is high because of difficulty in removing it. Temperature should not be above 48°c (120°F). Remove the ho2s from the Exhaust Manifold using the Oxygen Sensor wrench (J 39194). When installing, a special anti-seize compound gm p/n12377953 or the like must be applied on the threads of the old sensor in case it has to be reinstalled. Install the ho2s with the help of the Oxygen Sensor wrench (J 39194), and tighten it to 42 n.m (31 lb ft). Lastly, lower the vehicle, then reconnect the engine harness electrical connector to the ho2s pigtail and install the ho2s pigtail clip to the sight shield bracket re-install the intake manifold cover.

The replacement process of the heated oxygen sensor (HO2S) at Position 1 begins with acquiring the needed tool which is a Heated Oxygen Sensor Wrench (J 39194-B). First remove the intake manifold cover followed by removing the connector position assurance retainer and disconnect the engine harness electrical connector from the HO2S. You should remove the HO2S electrical connector clip from its position on the ignition coil bracket. You must use a Heated Oxygen Sensor Wrench (J 39194-B) to take out the HO2S but keep the pigtail connected with the permanent attachment and the connector safe. The threads of new or serviced HO2S should receive an anti-seize compound GM P/N 12377953 or equivalent when returning to use the original sensor. Follow the instructions to fasten the HO2S with a Heated Oxygen Sensor Wrench (J 39194-B) at 41 N.m (30 lb ft). Installation ends by reconnecting the engine harness electrical connector to the HO2S then installing the CPA retainer and attaching the HO2S electrical connector clip to the ignition coil bracket followed by the intake manifold cover.

Disconnect the HO2S electrical connector and carefully remove the HO2S.

Remove the HO2S retaining clip from the bracket and disconnect the HO2S electrical connector tab from the retaining clip, followed by the removal of the electrical connector retainer.

Connect the HO2S electrical connector and lower the vehicle.

The tools required include the Oxygen Sensor Wrench (J 39194).

Ensure the engine temperature is above 48°C (120°F) to facilitate removal.

Remove the intake manifold cover and disconnect the engine harness electrical connector from the HO2S pigtail.

Using any cleaning solvents and ensuring that the components remain free of grease, dirt, or contaminants.

The HO2S may be difficult to remove when engine temperature is below 48°C (120°F), and excessive force may damage threads in the exhaust manifold or exhaust pipe.

Tighten it to 41 N.m (30 lb ft) for both all-wheel drive and front-wheel drive configurations.

Coat the threads with anti-seize compound GM P/N 5613695 or an equivalent.

Maintain the integrity of the peripheral seal on the connector.

Lower the vehicle and reconnect the electrical connector to the HO2S.

The tools required include the Oxygen Sensor Wrench (J 39194).

Lower the vehicle, reconnect the engine harness electrical connector to the HO2S, install the CPA retainer, attach the HO2S electrical connector clip to the ignition coil bracket, and finally, reinstall the intake manifold cover.

Ensure that the sensor pigtail and harness wires are not damaged or exposed.

Apply anti-seize compound P/N 12377953 to the threads of the old sensor if re-installing, then install the HO2S to the exhaust manifold and tighten it to 42 N.m (31 lb ft). Reconnect the engine harness electrical connector to the HO2S connector, install the CPA retainer, attach the HO2S electrical connector to the ignition coil bracket, lower the vehicle, and finally reinstall the intake manifold cover.

Reconnect the HO2S electrical connector to the bracket, attach the harness electrical connector, install the electrical connector retainer, and finally, reinstall the fuel injector sight shield.

Disconnect the bank 1, oxygen sensor 2, electrical connector from the engine harness, taking care to observe precautions regarding heated oxygen and oxygen sensors as well as excessive force.

Lower the vehicle.

Apply a small amount of nickel-based anti-seize compound, avoiding any silicone-based products.

Any silicone-based products should be avoided.

Apply a small amount of nickel-based anti-seize compound that does not contain silicone.

Apply anti-seize compound P/N 5613695 to the threads.

Use the Oxygen Sensor Wrench (J 39194) to remove the HO2S.

Carefully remove the HO2S electrical connector retaining tab from the HO2S electrical connector, then disconnect the connector.

Next, remove the oxygen sensor electrical connector from the ignition coil bracket and take out the HO2S from the exhaust manifold.

Disconnect the electrical connector of the HO2S 2.

Reused sensors should be coated with anti-seize compound P/N 12377953 or equivalent.

Lower the electrical harness away from the underbody.

Connect the bank 2 sensor 2 electrical connector and install the CPA retainer before lowering the vehicle.

Remove the connector position assurance (CPA) retainer and disconnect the heated oxygen sensor (HO2S) electrical connector.

Take out the connector position assurance (CPA) retainer and disconnect the bank 1 sensor 1 electrical connector.

Use the Heated Oxygen Sensor Wrench (J 39194-B) to remove the sensor.

Coat the threads with anti-seize compound GM P/N 12377953 or an equivalent.

Gather the necessary tools, including the Oxygen Sensor Wrench (J 39194).

Tighten it to 41 N.m (30 lb ft).

Apply anti-seize compound P/N 12377953 to the threads if re-installing the old sensor.

The peripheral seal remains intact to prevent water intrusion.

Coat the threads with anti-seize compound GM P/N 5613695 or an equivalent.