Conditions for Setting the DTC
- The HO2S 2 parameter is between 290-685 mV during the passive test.
- One of the following tests fail:
Lean Intrusive Test
- The engine control module (ECM) detects that the HO2S 2 voltage is more than 290 mV for 11.4 seconds.
- The ECM detects that the HO2S 1 voltage is less than 100 mV.
Rich Intrusive Test
- The ECM detects that the HO2S 2 voltage is less than 685 mV for 11.4 seconds.
- The ECM detects that the HO2S 1 voltage is more than 777 mV.
- This diagnostic runs once per trip.