P0030: Ho2S Heater Control Circuit (Bank1/Sensor1): DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item		Detecting Condition	Possible Cause
DTC Strategy	Case 1)	Controller Malfunction - Gain/Offset	Related fuse blown or missing Heater control circuit open or short Power supply circuit open or short Contact resistance in connectors Faulty HO2S
	Case 2)	Check operative readiness
	Case 3)	Evaluate O2 sensor Element Temperature via measuring Element Resistance
Enable Conditions	Case 1)	No failure on front HO2S
	Case 2)	11 ≤ Battery voltage ≤ 16V Dew point exceeded
	Case 3)	Heater power control active since a certain time (O2 Sensor element temperature check) > 20 sec. Controlled Heating (controller malfunction check and element resistance check)
Threshold Value	Case 1)	Check if measured reference offset voltages and circuit gain lie within min./max. limits > thd.
	Case 2)	Operative readiness not reached after certain time with active heating > 30-100 sec.
	Case 3)	690°C (1, 274°F) < Front HO2S element temperature < 875°C (1, 607°F), 30 times during 50 monitoring cycle
Diagnostic Time	Case 1)	24 sec.
	Case 2)	30-100 sec.
	Case 3)	50 sec.
Fail-Safe		EVAP emission control function is controlled in minimum operation mode
Mil On Condition		2 Driving Cycles