P0159 O2 Sensor Circuit Slow Response (Bank 2/Sensor 2): DTC Detecting Condition

DTC P0159 DETECTING CONDITION TABLE

Item		Detecting Condition	Possible Cause
DTC Strategy		Monitor signal voltage	Poor connection B2S2 ECM
General Enable Conditions		Downstream O2S voltage before fuel cut > 0.55V Fuel cut off EGT around downstream O2S > 350C Downstream O2S internal resistance Battery voltage > 10.7V Time after dew point end detected > 30 sec
Case 1	Enable Conditions	Exhaust gas mass flow > 30kg/h
Case 1	Diagnostic Time	Response Time > 5.0 sec (Duration of Downstream O2S voltage from above 0.55 V to 0.15V during fuel cut off)
Case2	Enable Conditions	Exhaust gas mass flow > 10kg/h
Case2	Diagnostic Time	Transient Time > 0.3 sec (Duration of Downstream O2S voltage from 0.4V to 0.2 V during fuel cut off)
MIL ON Condition		2 driving cycle