Conditions For Setting DTC

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

ECM detects no affected HO2S 2 sensor activity, and the affected HO2S 2 voltage is 400-520 mV for more than 600 seconds.
The affected HO2S 2 calculated internal resistance is more than 40,000 ohms.