In case the sensor output is 0.4~0.52 V during 600sec or the internal resistance is over 40 ㏀ under enable conditions, ECM sets DTC P0136. ( This DTC might be caused by the malfunction of Heater circuit, so, check the heater circuit first. )
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
Signal check | 1. Poor connection 2. Open or short in signal circuit 3. S2 | |
General Enable Conditions |
•
Dew point end detected
•
Battery voltage > 11V
•
Exhaust Gas temperature = 350℃~800℃
•
No upstream O2 sensor heater error | ||
Case1 | ThresholdValue |
•
Sensor voltage : 0.4~0.52 V | |
DiagnosticTime |
•
600 sec | ||
Case2 | ThresholdValue |
•
Rate of heater pulse coupling to sensor signal > 5 times per every 10 heating pulses | |
MIL ON Condition |
•
3 driving cycle | ||
※ S2 : upstream oxygen sensor / S2 : downstream oxygen sensor
