Monitored & Set Conditions

1/1 Heated Oxygen Sensor (HO2S) voltage is monitored with engine coolant temperature more than 158°F (70°C), after reaching a vehicle speed of 10 MPH, and throttle remains open (off idle) for 2 minutes and subsequently bringing vehicle to a stop and allowing engine to idle in Drive. DTC will be stored in Powertrain Control Module (PCM) memory when PCM senses 1/1 HO2S voltage is switching from less than .33 volt to more than .61 volt and back less times than required. Possible causes for DTC to set are: intermittent condition, exhaust leak, defective 1/1 HO2S, or defective connectors or wiring.