Conditions for Running the DTC

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

Before the ECM can report DTC P2243 or P2247 failed, DTC P0030, P0031, P0032, P0050, P0051, P0052, P0135 and P0155 must run and pass.
The engine is operating.
The ignition voltage is between 11-18 volts.
The internal HO2S sensing element resistance is greater than 570 Ω.
The HO2S 1 heater is at operating temperature for greater than 20 seconds.
DTC P2243 and P2247 run continuously once the above conditions are met for greater than 2 seconds.