Condition 1
WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
The HO2S 1 signal voltage is between 400-600 mV, or the HO2S 1 signal voltage is less than 550 mv when the calculated exhaust temperature is colder than 800°C (1,472°F).