DTC Information: DTC Detecting Condition

Item		Detecting Condition	Possible Cause
DTC Strategy		Rationality check	Poor connector connection Short, open in upstream O2 sensor signal circuit Faulty upstream O2 sensor
Enable Conditions	Case1	30s elapsed after upstream dew point end detected Fuel feed back control active Battery voltage is higher than 11V Exhaust gas temperature is at between 480 and 800°C (896 and 1472°F) No injector error No upstream O2 sensor heater error Downstream O2 sensor voltage is higher than 0.6V
	Case2	30s elapsed after upstream dew point end detected Fuel feed back control active Battery voltage is higher than 11V Exhaust gas temperature is at between 480 and 800°C (896 and 1472°F) No injector error No upstream O2 sensor heater error Downstream O2 sensor voltage is lower than 0.1V
	Case3	30s elapsed after upstream dew point end detected Fuel feed back control active Battery voltage is higher than 11V Exhaust gas temperature is at between 480 and 800°C (896 and 1472°F) No injector error No upstream O2 sensor heater error
Threshold Value	Case1	Sensor voltage is at between 0.06 and 0.4V
	Case2	Sensor voltage is at between 0.6 and 1.15V
	Case3	Frequency of heater pulse coupling to sensor signal is higher than 5 times per every 10 heating pulses
Diagnostic Time	Case1	25s
	Case2	10s
	Case3	-
MIL ON Condition		3 driving cycles