DTC Information: DTC Detecting Condition

Item		Detecting Condition	Possible Cause
DTC Strategy		Heater Performance Check	Poor connector connection Open or Short to ground in power circuit Damaged or corroded terminals HO2S (B1S1)
Enable Conditions	Case 1	Battery voltage is between 10.7 and 16.1V Time after sensor heating started is over 35s Internal resistance signal is valid
	Case 2	Battery voltage is between 10.7 and 16.1V EGT around upstream O2S (Model) is higher than 450°C (842°F) Power of sensor heating is higher than 90% Sensor heating time is over 50s Fuel system status is No fuel cut-off over 50s Internal resistance signal is valid
	Case 3	Battery voltage is between 10.7 and 16.1V EGT around upstream O2S (Model) is higher than 450°C (842°F) Sensor heating time is over 50s Fuel system status is No fuel cut-off over 50s Internal resistance signal is valid
Threshold Value	Case 1	Ceramic temperature is higher than 755°C (1391°F) for 35sec after heating start (Pass decision is over 755°C (1391°F) for 3 s)
	Case 2	Ceramic temperature is higher than 755°C (1391°F) (Permanent diagnosis)
	Case 3	Ceramic temperature is higher than 630°C (1166°F) (Low temperature diagnosis)
Diagnostic Time	Case 1	3s
	Case 2	60s
	Case 3	10s
MIL ON Condition		2 driving cycles