REMOVAL & INSTALLATION

Gasoline Engines

The oxygen sensor is installed in the exhaust manifold (or the front catalytic converter on turbocharged vehicles), and is removed in similar manner to a spark plug. (Unlike spark plug removal, use an open-end wrench to avoid interference with the electrical lead.)

1. Disconnect the negative battery cable.
2. Unfasten the sensor's electrical connector.

   Fig. 1: Use an open-end wrench to remove and install the oxygen sensor

   Fig. 2: Handle the oxygen sensor very carefully, be sure not to damage the insulator

3. Using the correct size wrench, loosen and unscrew the oxygen sensor. If so equipped, be sure to also remove the crush ring gasket with the sensor.

   NOTE: Exercise care when handling the sensor; do not drop or handle it roughly. The electrical connector and louvered end must be kept free of grease and dirt.

4. Clean the threads of the sensor and its mounting location.

   To install:

5. If applicable, make sure that the crush ring gasket is threaded onto the sensor.
6. Coat the threads of the sensor with an anti-seize compound. Be careful to coat only the threads of the sensor; do not get compound on the sensor itself.
7. Screw the sensor and gasket into its mounting location and torque to specification.
8. Attach the sensor's electrical connector.
9. Connect the negative battery cable.