Oxygen Sensor - Stanza Wagon

Fig. 9 Oxygen Sensor Light Relay:

After the vehicle has been operated for 30,000 miles the oxygen sensor warning light located on the instrument panel will come on, indicating that the oxygen sensor should be checked.
After verifying oxygen sensor operation, reset the warning light hold relay, Fig. 9.
The warning light hold relay is located under the passenger seat on Stanza Wagon models.