Conditions for Setting the DTC
WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
P0131
- The control module detects that the HO2S 1 Voltage parameter is less than 25 mV.
- DTC P0131 sets within 100 seconds during the lean test when the above condition is met.
P0132
- The control module detects that the HO2S 1 parameter is more than 950 mV.
- DTC P0132 sets within 15 seconds during the rich test when the above condition is met.
P0137 Lean Test
- The control module detects that the HO2S 2 voltage parameter is less than 75 mV.
- These DTCs set within 100 seconds during the lean test when the above condition is met.
P0138 Rich Test
- The control module detects that the HO2S 2 voltage parameter is more than 950 mV.
- These DTCs set within 100 seconds during the rich test when the above condition is met.