P0136 O2 Sensor Circuit Malfunction (Bank 1/Sensor 2): DTC Detecting Condition

Item	Detecting Condition	Possible Cause
DTC Strategy	Check open circuit on rear HO2S	Open in signal harness Open in ground harness Contact resistance in connectors Faulty Heated O2 Sensor (HO2S)
Enable Condition	Sensor preheating and full heating phases finished No relevant failure 10V < Battery voltage < 16V
Threshold Value	0.37 < Downstream O2 Sensor voltage < 0.49V & sensor element resistance > 60kΩ
Diagnostic Time	30 sec.
Mil On Condition	2 Driving Cycles