Conditions for Setting the DTC

WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.

P0131, P0137, P0151, or P0157

The ECM detects that the HO2S voltage is less than 50 mV.
The DTCs set within 100 seconds when the above condition is met.

P0132, P0138, P0152, or P0158

The ECM detects that the HO2S voltage is greater than 1, 050 mV.
The DTCs set within 15 seconds when the above condition is met.