Conditions for Setting the DTC
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2013 GMC Yukon XL, 2013 GMC Yukon, 2013 Chevrolet Suburban, 2013 Chevrolet Avalanche, and 2013 Cadillac Escalade EXT. However, it is still accessible from the selected car via links, so may be relevant.
P2270
The ECM does not detect a HO2S voltage greater than 805 mV before accumulated mass air flow exceeds a calibrated value.
P2272
The ECM does not detect a HO2S voltage greater than 775 mV before the accumulated mass air flow exceeds a calibrated value.