If abnormal response rate of upstream O2 sensor under enable condition is detected, ECM sets DTC P0133.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Rationality check | 1. Poor connector connection 2. Air leak in intake or exhaust System 3. Faulty upstream O2 sensor |
General Enable Condition |
•
30 sec. elapsed after upstream dew point end detected
•
Fuel feedback control active
•
Battery voltage is higher than 11V
•
Exhaust gas temperature is at between 400℃(752℉) and 800℃(1472℉)
•
No injector error
•
No upstream O2 sensor heater error | |
Enable Condition |
•
Engine speed is at between 1320 RPM and 3520 RPM
•
Engine load is at between 20 and 75%
•
Fuel feedback control condition active | |
Threshold Value |
•
Average cycle period of upstream O2 sensor is over 2.30 sec. | |
Diagnosis Time |
•
30 signal cycles | |
MIL ON Condition |
•
3 driving cycles |
