GM 12604575
Oxygen Sensor

When replacing the heated Oxygen Sensor 1, first, clear out any codes using a scan tool and conduct the ho2s heater resistance learn reset when it is available to reset the ho2s resistance learned value to prevent possible failure. Now, unplug the connector position assurance (CPA) retainer and plug out the engine wiring harness electric connector from the heated Oxygen Sensor (HO2S) electric connector. Then, take out the ho2s sensor electrical connector from the camshaft cover. Take out the ho2s from the Exhaust Manifold using the j 39194-b (J 39194-B Heated Oxygen Sensor Wrench). When installing a new ho2s, apply anti-seize compound p/n 5613695 to the threads, and thread the ho2s into the Exhaust Manifold with your hand. Make sure to tighten the ho2s using the j 39194-b to 42 n.m (31 lb ft). Finally, reinstall the ho2s sensor electrical connector to the cam shield, reinstall the engine wiring harness electrical connector to the ho2s electrical connector, and reinstall the cpa retainer.

To repair the heated Oxygen Sensor 1 you need to first clear any codes using a scan tool and if available do the ho2s heater resistance learn reset to reinforce possible ho2s failure. Remove the cpa retainer and disconnect the engine wiring harness electrical connector from the heated Oxygen Sensor (HO2S) electrical connector. Next, disconnect the ho2s sensor electric connector on the camshaft cover. Utilizing heated Oxygen Sensor wrench (J 39194-B) depulsing ho2s catalyst from the Exhaust Manifold. While installing the new ho2s, it is necessary to apply the anti-seize compound (P/N 5613695) to the threads to make easier the subsequent thread removal from the holes. Thread the ho2s through the Exhaust Manifold manually and then use the heated Oxygen Sensor wrench (J 39194-B) to tighten to 42 nfs (31 lb ft). Finely reconnect the ho2s sensor electrical connection to the camshaft cover, reconnect the engine wiring harness electrical connector to the ho2s connecter, and replace the cpa retainer.

Vehicle support and elevation are necessary before commencing Heated Oxygen Sensor 2 replacement. The heated oxygen sensor (HO2S) electrical connector needs removal from the engine wiring harness electrical connector. After using Heated Oxygen Sensor Wrench (J 39194-B) to remove the HO2S the operation is complete. The threads of the sensor require application of the anti-seize compound (P/N 12377953) or equivalent material which functions as a special anti-seize mixture made from liquid graphite and glass beads to ease sensor removal. Tighten the HO2S with the Heated Oxygen Sensor Wrench (J 39194-B) to 42 N.m (31 lb ft) if necessary. Install the HO2S electrical connector onto the engine wiring harness electrical connector before lowering the vehicle.

Disconnect the heated oxygen sensor (HO2S) electrical connector from the engine wiring harness connector.

Clear any codes with a scan tool and perform an HO2S heater resistance learn reset if available.

Use the J 39194-B Heated Oxygen Sensor Wrench.

Disconnect the heated oxygen sensor (HO2S) electrical connector from the engine wiring harness connector.

Raise and support the vehicle.

Use the J 39194-B if necessary.

Use the J 39194-B Heated Oxygen Sensor Wrench (J 39194-B) to remove the HO2S if necessary.

Carefully remove the HO2S using the J 39194-B if necessary.

Disconnect the HO2S electrical connector from the engine wiring harness connector.

Thread the HO2S into the exhaust manifold by hand and then tighten it using the J 39194-B to a torque of 42 Nm (31 lb ft).