General Information: DTC Detecting Condition

Item		Detecting Condition	Possible Cause
DTC Strategy		Rationality check	Poor connection Open or short power/ground in signal circuit S1
General Enable Conditions		Dew point end detected Fuel feed back control active Battery voltage > 11V Exhaust Gas temperature = 536°F~1472°F No injector error No upstream O2 sensor heater error
Case1	Enable Conditions	S2 sensor voltage > 0.5V
	ThresholdValue	S1 sensor voltage: 0.06 ~ 0.4V
	DiagnosticTime	25 sec
Case2	Enable Conditions	S2 sensor voltage < 0.1V
	ThresholdValue	S1 sensor voltage: 0.6 ~ 1.08V
	DiagnosticTime	10 sec
Case3	Enable Conditions	Time after dew point end detected > 10s
Case3	ThresholdValue	Counter of \| Δusvk > 2V during 0.04 sec after heater on→off \| ≥ 5 times
MIL ON Condition		2 driving cycle

Δusvk: Sum of the signal voltage change value (S1)

S1: upstream oxygen sensor/S2: downstream oxygen sensor