Heated Oxygen Sensor Replace
Remove
Bank 1 - Sensor 1
- Disconnect the negative battery cable.
Note: The oxygen sensor uses a permanently attached pigtail and connector. This pigtail should not be removed from the oxygen sensor. Damage or removal of the pigtail or the connector affect the proper operation of the oxygen sensor. Take care when handing the oxygen sensor. Do not drop the oxygen sensor.
- Disconnect the upper heated oxygen sensor connector at the back of the Bank 1 cylinder head.
- Remove the exhaust front pipe. Refer to Exhaust Front Pipe Replace .
- Remove the rear primary catalytic converter. Refer to Catalytic Converter Replace .
- Remove the rear exhaust manifold. Refer to Exhaust Manifold Assembly Replace .
Important: Allow the engine to cool before removing the oxygen sensor. Removal of the oxygen sensor when the engine is hot may damage the threads in the exhaust manifold.
- Using the oxygen sensor remover/installer DW170-010, carefully remove the upper heated oxygen sensor from the rear exhaust manifold.
Bank 1 - Sensor 2
- Disconnect the negative battery cable.
- Disconnect the lower heated oxygen sensor connector.
Important: Allow the engine to cool before removing the oxygen sensor. Removal of the oxygen sensor when the engine is hot may damage the threads in the exhaust manifold.
- Using the oxygen sensor remover/installer DW170-010, carefully remove the lower heated oxygen sensor from the exhaust front pipe.
Bank 2 - Sensor 1
- Disconnect the negative battery cable.
- Disconnect the upper heated oxygen sensor connector.
Important: Allow the engine to cool before removing the oxygen sensor. Removal of the oxygen sensor when the engine is hot may damage the threads in the exhaust manifold.
- Using the oxygen sensor remover/installer DW170-010, carefully remove the upper heated oxygen sensor from the front exhaust manifold.
Bank 2 - Sensor 2
Disconnect the negative battery cable.
- Disconnect the lower heated oxygen sensor connector.
Important: Allow the engine to cool before removing the oxygen sensor. Removal of the oxygen sensor when the engine is hot may damage the threads in the exhaust manifold.
- Remove the lower heated oxygen sensor from the exhaust front pipe.
Install
Important: A special anti-seize compound is used on the oxygen sensor threads. This compound consists of a liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or serviced sensors will already have the compound applied to the threads. If a sensor is removed from any engine and is to be reinstalled, the threads must have an anti-seize compound applied before reinstallation.
Bank 1 - Sensor 1
- Coat the threads of the oxygen sensor with anti-seize compound, if needed.
- Using the oxygen sensor remover/installer DW170-010, install the upper heated oxygen sensor to the rear exhaust manifold. This pigtail should not be removed from the oxygen sensor. Damage or removal of the pigtail or the connector affect the proper operation of the oxygen sensor. Take care when handing the oxygen sensor. Do not drop the oxygen sensor.
Tighten
Tighten the heated oxygen sensor to 50 N•m (37 lb-ft).
Bank 1 - Sensor 2
- Coat the threads of the oxygen sensor with anti-seize compound, if needed.
- Using the oxygen sensor remover/installer DW170-010, install the lower heated oxygen sensor to the exhaust front pipe.
Tighten
Tighten the heated oxygen sensor to 50 N•m (37 lb-ft).
- Connect the upper heated oxygen sensor connector.
- Connect the negative battery cable.
Bank 2 - Sensor 1
- Coat the threads of the oxygen sensor with anti-seize compound, if needed.
- Using the oxygen sensor remover/installer DW170-010, install the upper heated oxygen sensor to the front exhaust manifold.
Tighten
Tighten the heated oxygen sensor to 50 N•m (37 lb-ft).
- Connect the upper heated oxygen sensor connector.
- Connect the negative battery cable.
Bank 2 - Sensor 2
- Coat the threads of the oxygen sensor with anti-seize compound, if needed.
- Using the oxygen sensor remover/installer DW170-010, install the lower heated oxygen sensor to the exhaust front pipe.
Tighten
Tighten the heated oxygen sensor to 50 N•m (37 lb-ft).
- Connect the lower heated oxygen sensor connector.
- Connect the negative battery cable.