Conditions For Setting DTC
WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue and 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
The HO2S 2 voltage remains within 150 millivolts of bias voltage (about 450 millivolts) for more than a predetermined time. The of time ranges between 50-130 seconds, depending on engine coolant temperature at start-up and on average air flow since start-up.