Conditions for Setting the DTC
WARNING: This page is about a different car, the 2007 Isuzu i-370, 2007 GMC Canyon, and 2007 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
Lean Test
- The PCM detects that the HO2S 1 voltage parameter is less than 50 mV.
- DTC P0131 sets within 100 seconds during the lean test when the above condition is met.
Power Enrichment Test
- The PCM detects that the HO2S 1 voltage parameter is less than 550 mV and the HO2S 2 parameter is more than 700 mV.
- DTC P0131 sets within 10 seconds during the power enrichment test when the above condition is met.