If there is abnormal response rate of HO2S under enable conditions, ECM sets DTC P0133.
(This DTC might be caused by the malfunction of Heater circuit, so, check the heater circuit first.)
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Response rate | 1. Poor connection 2. leak or clog in intake air system 3. Injector 4. Fuel pressure 5. S1 |
Enable Conditions |
•
Dew point end detected
•
Fuel feed back control active
•
Battery voltage is higher than 11V
•
Exhaust Gas temperature is between 280℃ and 800℃
•
No injector error
•
No upstream O2 sensor heater error
•
Engine speed is between 1800rpm and 2800rpm
•
Engine load is between 20% and 65% | |
Threshold Value |
•
Cycle period of S1 signal is higher than 1.75 sec. | |
Diagnostic Time |
•
20 cycle | |
MIL ON Condition |
•
3 driving cycle |
