General Information: DTC Detecting Condition

Item	Detecting Condition	Possible Cause
DTC Strategy	Monitor the current through the heater	Poor Connection HO2S (B1/S2) PCM
Enable Conditions	Engine Running > 60 sec. Heater Duty Cycle > 40% Max. Duty Cycle - Min. Duty Cycle < 5%
Threshold value	Filtered Heater Current < threshold value
Diagnosis Time	Continuous (More than 2.5 second failure for every 5 second test)
MIL On Condition	2 Drive Cycles