Special Tools

EN-48259 Oxygen Sensor Remover/Installer

Warning: Refer to Battery Disconnect Warning in the Preface section.




1. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.

Caution: Refer to Heated Oxygen and Oxygen Sensor Caution in the Preface section.

2. Disconnect the front heated oxygen sensor (HO2S1) connector.

Caution: Refer to Heated Oxygen and Oxygen Sensor Caution in the Preface section.

3. Carefully remove the HO2S1 (1) by using EN-48259 from the exhaust manifold.

Note: 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 service sensors will already have the compound applied to the threads. If a sensor is removed from any engine and if for any reason it is to be reinstalled, the threads must have anti-seize compound applied before reinstallation.

1. Coat the threads of the HO2S1 with an anti-seize compound, if needed.

Caution: Refer to Fastener Caution in the Preface section.

2. Install the HO2S1 (1) into the exhaust manifold and tighten to 42 N·m (31 lb ft).
3. Connect the HO2S1 connector.
4. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.