Conditions for Setting the DTC

The ECM detects that the HO2S 2 voltage is greater than 629 mV for greater than 100 seconds, then an intrusive test is performed. The ECM will lean the fuel mixture -2 percent per second up to -15 percent then hold the enleanment for 10 seconds. If the ECM detects that the HO2S voltage is greater than 629 mV during the intrusive test, for greater than 4 seconds or for a cumulative of 30 seconds, the DTC sets.