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

DTC DETECTING CONDITION CHART

Item		Detecting Condition	Possible Cause
DTC Strategy	Case 1	Evaluate O2 sensor element temperature via measuring element resistance	Related fuse blown or missing Heater control circuit open or short Power supply circuit open or short Poor connection or damaged harness Faulty HO2S
	Case 2	Check operative readiness after certain time with active heating
	Case 3	Check if the controller gain/offset are within min/max limit
Enable Conditions		No relevant failure 11 ≤ Battery voltage ≤ 16V Dewpoint exceeded Heater power control active since a certain time (O2 Sensor element temperature check) > 20 sec. Heater control activating (controller malfunction check and element resistance check)
Threshold Value	Case 1	690°C (1,274°F) < Front HO2S element temperature < 875°C (1, 607°F)
	Case 2	Heating time > 30 ~ 100 sec.
	Case 3	Values out of boundaries and timer > THD
Diagnostic Time	Case 1	50 sec.
	Case 2	30~100 sec.
	Case 3	24 sec.
MIL On Condition		2 Driving Cycles