If the average of loaded voltage is over 2.8 V or the internal resistance is over 40 kΩ under enable conditions, the PCM 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. HO2S(S2) |
Enable Conditions |
•
Duration of Down O2S greater than 0.4 and less than 0.5V for more than 3 sec.
•
Load pulse : End of 3rd pulse.
•
B+ greater than 10.7 V.
•
Heat quantity from exhaust gas around downstream O2S greater than 1~312 kJ. | ||
Threshold Value |
•
Average of loaded voltage greater than 2.8 V. | ||
Case 2 | DTC Strategy |
•
Open circuit, Internal resistance too high. | |
Enable Conditions |
•
B+ greater than 10.7 V.
•
EGT around downstream O2S greater than 600 ℃(1112 °F) or Heat quantity from exhaust gas around downstream O2S greater than 1~312 kJ. | ||
Threshold Value |
•
Internal resistance greater than 40 kΩ. | ||
Diagnostic Time |
•
3 sec. | ||
MIL ON Condition |
•
2 driving cycles. | ||
※ S2 : upstream oxygen sensor / S2 : downstream oxygen sensor
