Bank 1 Sensor 1

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.

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 12377953 or equivalent.

If a sensor is reused, install a new gasket P/N 01555476 or equivalent .



1. Disconnect the HO2S electrical connector.
2. Remove the electrical connector from the mounting hole.
3. Remove the HO2S from the exhaust manifold.

Bank 1 Sensor 1

Important: Ensure that the correct replacement HO2S is used. HO2S #1(engine) has a 12 Watt heater (AFS-134) and HO2S #2 (post-converter) has an 18 Watt heater (AFS-116). The connectors are identical, however, the sensors should not be interchanged.

1. Install the HO2S in the rear exhaust manifold.

Tighten
Tighten the HO2S to 41N·m (30 lb ft).

2. Install the electrical connector into the mounting hole.
3. Connect the HO2S electrical connector.

Bank 1 Sensor 2 (Post-Converter)

1. Raise the vehicle.
2. Disconnect the HO2S electrical connector.
3. Remove the electrical connector from the mounting hole.
4. Remove the HO2S from the exhaust pipe.

Bank 1 Sensor 2 (Post-Converter)

Important: Ensure that the correct replacement HO2S is used. HO2S #1(engine) has a 12 Watt heater (AFS-134) and HO2S #2 (post-converter) has an 18 Watt heater (AFS-116). The connectors are identical, however, the sensors should not be interchanged.

1. Install the HO2S in the rear exhaust pipe.

Tighten
Tighten the HO2S to 41N·m (30 lb ft).

2. Install the electrical connector into the mounting hole.
3. Connect the HO2S electrical connector.
4. Lower the vehicle.