Oxygen Sensor
Oxygen Sensor
The exhaust pipes and catalytic converter become very hot during engine operation. Allow the engine to cool before removing the oxygen sensors. Failure to allow the engine to cool before removal may result in personal injury caused by burns.
Removing
• Use an O2 sensor removal tool for this procedure.
The engine is equipped with four heated oxygen sensors:
• The left upstream oxygen sensor (1) is referred to as the 1/1 sensor.
• The left downstream oxygen sensor (4) is referred to as the 1/2 sensor.
• The right upstream oxygen sensor (3) is referred to as the 2/1 sensor.
• The right downstream oxygen sensor (2) is referred to as the 2/2 sensor.
The exhaust pipes and catalytic converter become very hot during engine operation. Allow the engine to cool before removing the oxygen sensor.
- Disconnect the negative battery cable.
- Raise and support the vehicle.
When disconnecting the oxygen sensor electrical connector, do not pull directly on the wire going into the sensor. The sensor wiring can be damaged resulting in sensor failure.
- Disconnect the heated oxygen sensor electrical connector.
- Remove the oxygen sensor.
- Clean the exhaust pipe threads using an appropriate tap.
Installing
- If reinstalling the original oxygen sensor, coat the sensor threads with an anti-seize compound. New sensors have compound on the threads and do not require an additional coating.
• Do not add any additional anti-seize compound to the threads of a new oxygen sensor.
- Install the oxygen sensor and tighten to:
• Left upstream oxygen sensor (1), 43 Nm (32 ft. lbs.).
• Left downstream oxygen sensor (4), 43 Nm (32 ft. lbs.).
• Right upstream oxygen sensor (3), 43 Nm (32 ft. lbs.).
• Right downstream oxygen sensor (2), 45 Nm (33 ft. lbs.).
Never apply any type of grease to the oxygen sensor electrical connector, or attempt any repair of the sensor wiring harness.
- Connect the heated oxygen sensor electrical connector.
- Lower the vehicle.
- Connect the negative battery cable.