Park Avenue V6-3.8L SC VIN 1 (2005)
Oxygen Sensor: Service and Repair
Heated Oxygen Sensor (HO2S) 1 Replacement
HEATED OXYGEN SENSOR (HO2S) 1 REPLACEMENT
TOOLS REQUIRED
J 39194 Oxygen Sensor Wrench
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.
REMOVAL PROCEDURE
1. Remove the fuel injection sight shield.
2. Turn OFF the ignition switch.
3. Remove the HO2S retaining clip from the bracket.
4. Disconnect the HO2S electrical connector tab from the HO2S 1 retaining clip.
5. Remove the HO2S electrical connector retainer.
6. Raise and support the vehicle. Refer to Vehicle Lifting.
7. Remove the rear oxygen sensor (2) from the rear exhaust manifold carefully using the J 39194.
IMPORTANT: Remove oxygen sensors with the engine temperature above 48°C (120°F). Otherwise the oxygen sensors may be difficult to remove.
INSTALLATION PROCEDURE
1. Install the rear oxygen sensor (1) in the rear exhaust manifold.
NOTE: Refer to Fastener Notice in Service Precautions.
IMPORTANT: 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.
Tighten the rear HO2S to 41 N.m (30 lb ft).
