Conditions for Running the DTC: P2271

WARNING: This page is about a different car, the 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0036, P0037, P0038, P0137, P0138, P0140, P0141, P0443, P0458, P0459, P2232 are not set.
The engine is running.
The ignition voltage is more than 10.5 volts.
The HO2S 2 has been in Closed Loop for more than 10 seconds.
DFCO is inactive.
The engine air flow has been between 5.56-33.33 g/sec for more than 3 seconds, and is currently more than 9.72 g/sec.
DTC P2271 runs continuously when the above conditions are met.