In case the sensor output is 0.4~0.52 V during 600sec or the internal resistance is over 40 ㏀ under enable conditions, ECM/PCM 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 | Case 1 |
•
Feedback check | 1. Poor connection 2. Open or short in signal circuit 3. Downstream O2S |
Case 2 |
•
Internal resistance check | ||
Case 3 |
•
O2S signal monitoring | ||
Enable Conditions | Case 1 |
•
[Duration of 0.4 < Down O2S < 0.5V] > 3 sec
•
Load pulse : End of 3rd pulse
•
Battery voltage > 10.7V | |
Case 2 |
•
Battery voltage > 10.7V
•
Exhaust Gas temperature around downstream O2S > 600℃ | ||
Case 3 |
•
Battery voltage > 10.7V
•
Time after heat quantity > 10 sec | ||
Threshold Value | Case 1 |
•
Average of loaded voltage > 2.8V | |
Case 2 |
•
Internal resistance > 40kΩ | ||
Case 3 |
•
[Counter of ∆ downstream O2S voltage > 2V during 0.04 sec after heater on->off] > 4 times | ||
Diagnosis Time |
•
- | ||
MIL ON Condition |
•
2 trips | ||
※ S2 : upstream oxygen sensor / S2 : downstream oxygen sensor
