DTC P0030 Ho2S Heater Control Circuit (Bank 1/Sensor 1): DTC Detecting Condition

DTC DETECTING CONDITION

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 Dewpoint exceeded
	Case 3	Heater power control active since a certain time (02 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