DTC P0154: Ho2S Circuit No Activity Detected Bank 2/Sensor 1: DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item	Detecting Condition	Possible cause
DTC Strategy	O2 sensor staying time (TFB2) below or under the reference voltage to decide rich/lean is monitored.	Poor connection Intake/Exhaust system for leak Resistance of wire in HO2S circuit Open or short in HO2S heater circuit Defective HO2S Improper fuel pressure Defective ECM
Enable Conditions	Engine coolant > 60°C Engine speed 1750~3500 rpm Load value 25% ~ 70%
Threshold value	Time, TFB2 is greater than or equal to 30 sec
Diagnosis Time	30 sec continuous
MIL On Condition	1 driving cycles