DTC P0141 Ho2S Heater Circuit (Bank 1/Sensor 2): DTC Detecting Condition

DTC DETECTING CONDITION AND POSSIBLE CAUSES

Item	Detecting Condition	Possible Cause
DTC Strategy	Heater current check	Poor connection Open or short to ground in signal circuit B1S2 ECM/PCM
Enable Conditions	Catalyst temperature (model) 200-550°C (392-1022°F) Intake air temperature > -7°C (19.4°F) Battery voltage 10.7-16.1V
Threshold Value	Internal resistance > threshold f (cat. temp., heater power)
Diagnostic Time	Above 6 sec
MIL ON Condition	2 driving cycle
* B1S1: upstream oxygen sensor/B1S2: downstream oxygen sensor