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 |
•
Electrical check | 1. Poor connection 2. Open or short in signal circuit 3. HO2S (S2) | |
General Enable Conditions |
•
Dew point end detected
•
Battery voltage is higher than 11V
•
Exhaust Gas temperature is higher than 280°C and lower than 800°C
•
No upstream O2 sensor heater error | ||
Case1 | Threshold Value |
•
S2 voltage is higher than 0.4V and lower than 0.52V | |
Diagnostic Time |
•
600 sec. | ||
Case2 | Threshold Value |
•
Internal resistance is higher than 40 ㏀ | |
MIL ON Condition |
•
3 driving cycles | ||
※ S1 : upstream oxygen sensor / S2 : downstream oxygen sensor
