If ECM/PCM detects abnormal sensor heater performance under enable condition, ECM/PCM sets DTC P0135.
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
Heater Performance Check | 1. Poor connection 2. Open or Short to ground in power circuit 3. Open in control circuit 4. Upstream O2S | |
Enable Conditions | Case 1 |
•
10.5 < Battery Voltage < 16.0V
•
Sensor heating time > 45 sec. | |
Case 2 |
•
Exhaust Temp > 450℃
•
Power of Sensor heating > 90%
•
Sensor heating time > 50 sec
•
No Fuel Cut > 50 sec | ||
Case 3 |
•
Exhaust Temp > 450℃
•
Sensor heating time > 50 sec
•
No Fuel Cut > 50 sec | ||
Threshold Value | Case 1 |
•
Upstream O2S Temp. is lower than 720℃ | |
Case 2 |
•
Upstream O2S Temp. is lower than 720℃ | ||
Case 3 |
•
Upstream O2S Temp. is lower than 640℃ | ||
Diagnosis Time |
•
- | ||
MIL ON Condition |
•
2 trips | ||
※ S1 : upstream oxygen sensor / S2 : downstream oxygen sensor
