Conditions for Setting the DTC
WARNING: This page is about a different car, the 2018 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
P0131 or P0137
The engine control module detects that the heated oxygen sensor voltage is less than 40 mV for greater than 40 s.
P0132 or P0138
The engine control module detects that the heated oxygen sensor voltage is greater than 1 050 mV for greater than 10 s.