If the average of loaded voltage is over 2.8 V or the internal resistance is over 40 kΩ under enable conditions, the ECM sets DTC P0136.
Item | Detecting Condition | Possible Cause | |
Case 1 | DTC Strategy |
•
Feedback : fails to enter, defaults out by Load pulse | 1. Poor connection 2. Open in signal circuit 3. S2 |
Enable Conditions |
•
Duration of 0.4 < Down O2S < 0.5V for more than 3 sec.
•
Load pulse : End of 3rd pulse
•
B+ > 10.7 V
•
Heat quantity from exhaust gas around downstream O2S > 1~312 kJ | ||
Threshold Value |
•
Average of loaded voltage > 2.8 V | ||
Case 2 | DTC Strategy |
•
Open circuit, Internal resistance too high | |
Enable Conditions |
•
B+ > 10.7 V
•
EGT around downstream O2S > 600 ℃(1112 °F) or Heat quantity from exhaust gas around downstream O2S > 1~312 kJ | ||
Threshold Value |
•
Internal resistance > 40 kΩ | ||
Diagnostic Time |
•
3 sec. | ||
MIL ON Condition |
•
2 driving cycles | ||
※ S1 : upstream oxygen sensor / S2 : downstream oxygen sensor
