Conditions For Setting DTC
WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
PCM detects that HO2S 2 voltage remains within 150 mV of the bias voltage about 450 mV for a longer amount of time. The amount of time ranges between 100-130 seconds depending on ECT at start-up and average Mass Airflow (MAF) since start-up.