Monitored & Set Conditions

1/2 Heated Oxygen Sensor (HO2S) operation is monitored when engine is running for more than 2 minutes and engine coolant temperature is more than 151°F (67°C). DTC will be stored in Powertrain Control Module (PCM) memory if 1/2 HO2S signal voltage is .35-.58 volt for 30 seconds and then 1.5 volts for 1.5 minutes. Possible causes for DTC to set are: intermittent condition, defective 1/2 HO2S, defective PCM, or defective connectors or wiring.