Conditions for Running the DTC

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The engine is operating.
The ignition 1 voltage is more than 10.5 volts.
The engine coolant (ECT) temperature is more than 5°C (41°F).
The HO2S 2 heaters are commanded ON.
DTCs P0141 and P0161 run continuously once the above conditions are met.