Conditions for Setting the DTC
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
P0131
- The PCM detects that the HO2S 1 signal voltage is less than 52 mV for more than 26 seconds.
- This diagnostic runs continuously.
P0132
- The PCM detects that the HO2S 1 signal voltage is more than 1,050 mV for more than 9 seconds.
- This diagnostic runs continuously.
P0137
- The PCM detects that the HO2S 2 signal voltage remains below 52 mV for more than 60 seconds.
- This diagnostic runs continuously.
P0138
- The HO2S 2 voltage is more than 1,050 mV for longer than 60 seconds.
- This diagnostic runs continuously.