When internal resistance and average of loaded voltage is higher than specification under enable condition, ECM sets DTC P0136 and tuns the MIL on.
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
Rationality check | 1. Poor connector connection 2. Short/open in upstream O2 sensor signal circuit 3. Faulty downstream O2 sensor | |
General Enable Condition |
•
30 sec. elapsed after downstream dew point end detected
•
Battery voltage is higher than 11V
•
Exhaust gas temperature around O2 sensor is higher than 350℃(662℉)
•
No downstream O2 sensor heater error | ||
Enable Condition |
•
- | ||
Threshold Value | Case 1 |
•
Sensor voltage is at between 0.4V and 0.50V | |
Case 2 |
•
Rate of heater pulse coupling to sensor signal is more than 5 times per every 10 heating pulses | ||
Diagnostic Time | Case 1 |
•
600 sec. | |
Case 2 |
•
- | ||
MIL ON Condition |
•
3 driving cycles | ||
