DTC P0135 Ho2S Heater Circuit (Bank 1 / Sensor 1): DTC Detecting Condition

DTC DETECTING CONDITION AND POSSIBLE CAUSES

Item	Detecting Condition	Possible Cause
DTC Strategy	Heater current check	Poor connction Open or short to ground in control circuit B1S1 ECM/PCM
Enable Conditions	Exhaust gas temperature (model) : 200~550 °C (392~1022°F) Intake air temperature > -7 °C (19.4°F) Battery voltage 10.7~16.1 V
Threshold Value	Internal resistance > threshold f(exh. temp., heater power)
Diagnostic Time	Above 15 sec
MIL ON Condition	2 driving cycle
* B1S1: upstream oxygen sensor / B1S2: downstream oxygen sensor