DTC Information: DTC Detecting Condition

Item		Detecting Condition	Possible Cause
DTC Strategy		Monitor the upstream O2 sensor heater performance	Poor connector connection Faulty upstream O2 sensor circuit Faulty upstream O2 sensor (B1/S1)
Enable Conditions	Case 1	Battery voltage (10.7V to 16.1V) Heating time is more than 35s Normal internal resistance signal
	Case 2	Battery voltage (10.7V to 16.1V) Exhaust Gas temperature is higher than 450°C (842°F) Heat power is more than 90% Heating time is more than 50s It is not fuel cutting (50s) Normal internal resistance signal
	Case 3	Battery voltage (10.7V to 16.1V) Exhaust Gas temperature is higher than 450°C (842°F) Heating time is more than 50s It is not fuel cutting (50s) Normal internal resistance signal
Threshold Value	Case 1	Ceramics temperature is less than 755°C (1391°F) (after start heating, diagnose for 35s)
	Case 2	Ceramics temperature is less than 755°C (1391°F)
	Case 3	Ceramics temperature is less than 630°C (1166°F)
Diagnostic Time	Case 1	3s
	Case 2	60s
	Case 3	10s
MIL ON Condition		2 driving cycles