HO2S 2

REMOVAL PROCEDURE

TOOLS REQUIRED
J 39194 Oxygen Sensor Wrench

The heated oxygen sensor may be difficult to remove when engine temperature is below 48°C (120°F). Excessive force may damage threads in exhaust manifold or exhaust pipe.

NOTE:
^ The Heated Oxygen Sensor (HO2S) and the Oxygen Sensor use a permanently attached pigtail and connector. Do not remove this pigtail from the Heated Oxygen Sensor. Damage or the removal of the pigtail or the connector could affect the proper operation of the sensor.
^ Take care when handling the HO2S and the O2S. Keep the in-line electrical connector and the louvered end free of grease, dirt, or other contaminants. Also avoid using cleaning solvents of any type. Do not drop the HO2S or the O2S. Do not roughly handle the HO2S or the O2S.
^ Remove oxygen sensors with the engine temperature above 48°C (120°F). Otherwise the oxygen sensors may be difficult to remove.
^ A special anti-seize compound is used on the oxygen sensor threads. New service sensors should already have the compound applied to the threads. Coat the threads of a reused sensor with anti-seize compound P/N 5613695 or equivalent.

1. Turn OFF the ignition.

CAUTION: Refer to Vehicle Lifting Caution in Service Precautions.

2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
3. Disconnect the electrical connector.

IMPORTANT: A special anti-seize compound is used on the heated oxygen sensor threads. The compound consists of graphite suspended in fluid arid glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will already have the compound applied to the threads. If a sensor is removed from an engine and if for any reason is to be reinstalled, the threads must have anti-seize compound applied before reinstallation.

4. Using special tool J 39194-B heated oxygen sensor wrench carefully back out the heated oxygen sensor.

INSTALLATION PROCEDURE
1. Coat the threads of heated oxygen sensor-catalyst monitor with anti-seize compound P/N 5613695, or equivalent if necessary.

NOTE: Refer to Fastener Notice in Service Precautions.

2. Using J 39194-B oxygen sensor socket install the heated oxygen sensor.

Tighten
Tighten the HO2S 2, post-catalytic converter, to 42 ± 4 N.m (31 lb ft).

3. Connect the electrical connector.
4. Lower the vehicle.