Removal Procedure

1. Disconnect the negative battery cable.
2. Locate the four oxygen sensors.
- Bank 1 sensor 1 is mounted on the exhaust pipe ahead of the right-hand catalytic converter.
- Bank 1 sensor 2 is mounted behind the right-hand catalytic converter.
- Bank 2 sensor 1 is mounted on the exhaust pipe ahead of the left-hand catalytic converter.
- Bank 2 sensor 2 is mounted behind the left-hand catalytic converter.
3. Disconnect the pigtail from the wiring harness.

IMPORTANT: The pigtail is permanently attached to the sensor. Be careful not to pull the wires out.

NOTE: Do not use a torch to remove an HO2S unless the sensor is being replaced. Using a torch could damage the sensor.

4. Remove the sensor from the exhaust pipe.
- Because of the expansion and contraction of the metal in the exhaust system over time, this may be difficult if the engine temperature is below 48°C (120°F).