DTC Information And Inspection: DTC Detecting Condition

Item		Detecting Condition	Possible Cause
DTC Strategy		Characteristic Monitoring	Poor Connector Connection Faulty Upstream O2 Sensor
Enable Condition	Case 1	Sensor Pump current valid Downstream O2 Sensor operative readiness detected (Downstream O2 sensor voltage lower than 0.25V or higher than 0.56V & Downstream O2 sensor max heating finished) Active Test not activated Catalyst purge after fuel cut off not active Engine speed higher than 600 RPM Mass air flow less than 83 g/sec Exhaust gas Temp. higher than 572°F (300°C) and lower than 1472°F (800°C) Stable driving condition
Enable Condition	Case 2	No Fuel Cut Off No Full Load No catalyst overheating protection Battery voltage higher than 11V and lower than 16V
Threshold Value	Case 1	Upstream Lambda (lean) over 1.1 and Downstream O2 signal voltage over 0.75V (rich) and lambda controller in limit (50%)
Threshold Value	Case 2	Lambda value over 0.9 when lambda setpoint is 0.8
Diagnostic Time	Case 1	5 to 100 sec. depending on intake air mass
Diagnostic Time	Case 2	10 sec. after lambda setpoint shift to corresponding side
MIL ON Condition		2 Driving Cycles