If there is an abnormal response rate of HO2S under enable conditions, the ECM sets DTC P0133.
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. S1 |
Enable Conditions |
•
Upstream O2 Sensor Ceramic temp > 720 ℃(1328 °F)
•
ECT > 40.5 ℃(104.9 °F)
•
Purge mass duration > 5 sec.
•
25 % < Engine load < 65 %
•
Catalyst temp > 400 ℃(752 °F)
•
No fuel cut off
•
Fuel system status = Closed Loop
•
1320 rpm > Engine speed and Engine speed > 3000 rpm | |
Threshold Value |
•
Compare ratio of Expected Area to Actual Area < 0.35 | |
Diagnostic Time |
•
10 switches in Lambda setpoint steps(5 for Lean-Rich, 5 for Rich-Lean) | |
MIL ON Condition |
•
2 driving cycles |
※ S1 : upstream oxygen sensor / S2 : downstream oxygen sensor
