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 > 11V
•
Exhaust Gas temperature = 280℃~800℃
•
No injector error
•
No upstream O2 sensor heater error
•
Engine speed 1800∼2800rpm
•
Engine load 20∼65% | |
Threshold Value |
•
Cycle period of S1 signal > 1.75 sec | |
Diagnostic Time |
•
11 cycle | |
MIL ON Condition |
•
3 driving cycle |
※ S1 : upstream oxygen sensor / S2 : downstream oxygen sensor
