If there is abnormal response rate of HO2S under enable conditions, ECM/PCM 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 monitor(6-Pattern Monitoring) | 1. Poor connection 2. Leak or clog in intake air system 3. Injector 4. Fuel pressure 5. HO2S(S1) |
Enable Conditions |
•
Dew point end detected
•
Fuel feed back control active
•
Battery voltage is higher than 11V
•
Exhaust Gas temperature is higher than 280℃ and lower than 800℃
•
No injector error
•
No upstream O2 sensor heater error
•
Engine speed is higher than 1800rpm and lower than 2800rpm
•
Engine load is higher than 20% and lower than 65% | |
Threshold Value |
•
Difference between real signal period and modeled signal period is higher than 1.75 sec. | |
Diagnostic Time |
•
20 signal cycles | |
Mil On Condition |
•
3 driving cycles |
※ S1 : upstream oxygen sensor / S2 : downstream oxygen sensor
