DeVille V8-4.6L VIN Y (1998)
Oxygen Sensor: Service and Repair
Bank 1 Sensor 2/3 (Pre and Post Catalyst) HO2S
REMOVAL PROCEDURE
NOTICE: Remove oxygen sensors with the engine temperature above 48°C (120°F). Otherwise the oxygen sensors may be difficult to remove.
NOTICE: Take care when handling oxygen sensors. The electrical connector and louvered end must be kept free of contaminants. Do not use cleaning
solvents on the sensor. Do not drop or mishandle the sensor.
NOTICE: 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.
Bank 1 Sensor 2 or 3
1. Raise and support the vehicle.
2. Disconnect the pre- or post-converter oxygen sensor connector.
3. Remove the pre- or post-converter oxygen sensor.
INSTALLATION PROCEDURE
Bank 1 Sensor 2 or 3
NOTICE: Refer to Fastener Notice in Service Precautions.
1. Install the pre- or post-converter oxygen sensor.
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Tighten the Pre or Post HO2S sensor to 41 N.m (30 lb. ft).
2. Connect the pre- or post-converter oxygen sensor connector.
IMPORTANT: Ensure connectors are securely installed beneath harness heat shield to prevent connector damage.
3. Lower the vehicle.
