Oxygen Sensor: Service and Repair

Oxygen Sensor (O2S) Removal And Installation

Oxygen Sensor (O2S) Removal

1. Disconnect the negative battery cable.

CAUTION: The oxygen sensor (O2S) uses a permanently attached pigtail and connector. This pigtail should not be removed from the O2S. Damage or removal of the pigtail or the connector could affect proper operation of the O2S. Take care when handling the O2S. Do not drop or damage the O2S.




2. Disconnect the oxygen sensor wiring harness connector.
3. Remove the exhaust manifold feat shield bolts.




4. Remove the exhaust manifold feat shields.




5. Remove the oxygen sensors (O2S) from the pup converter.

CAUTION: The oxygen sensor may be difficult to remove when the engine temperature is below 118 °F (48 °C). Excessive force may damage the threads in the exhaust manifold.

Oxygen Sensor (O2S) Installation




1. Installation should follow the removal procedure in the reverse order.

NOTE: A special anti-seize compound is used on the O2S 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.

2. Install the oxygen sensor (O2S).

Tighten: Tighten the oxygen sensor to 34 ~ 44 N.m (25 ~ 32 lb.ft).

3. Install the exhaust manifold shields.

Tighten: Tighten the exhaust manifold heat shield bolts to 18 ~ 22 N.m (13 ~ 16 lb.ft).




4. Connect the negative battery cable.