DTC P0134 Ho2S Circuit No: Activity Detected (Bank 1/Sensor 1): DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item		Detecting Condition	Possible Cause
Case 1)	DTC Strategy	Signal plausibility during fuel cut off	Related fuse blown or missing Contact resistance in connectors HO2S contamination
	Enable Conditions	Sensor preheating and full heating phases finished Fuel Cut Off active Integrated Mass Air Flow > 16g Fuel Cut Off phase No relevant failure Battery voltage > 10V
	Threshold Value	Voltage with fuel cut off > 0.1V
	Diagnostic Time	5 Sec
Case 2)	DTC Strategy	Signal stroke plausibility
	Enable Conditions	Sensor preheating and full heating phases finished Signal stroke valid (5 P-jump after Lambda regulation activation) Lambda controller is not on the limit Lean/rich cycle time < 2.5 sec No relevant failure Battery voltage > 10V
	Threshold Value	Sensor voltage < 0.25V
	Diagnostic Time	2 min
Mil On Condition		2 Driving Cycles