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 | 1. Poor connection 2. leak or clog in intake air system 3. Injector 4. Fuel pressure 5. Upstream O2S |
Enable Conditions |
•
Upstream O2S Ceramic temp > 720 ℃
•
ECT > 40.5 ℃
•
Purge mass duration > 5 sec.
•
22% < Engine load < 70%
•
Catalyst temp > 400 ℃
•
No fuel cut off
•
Fuel system status : Closed Loop
•
1320 < Engine RPM < 3200 | |
Threshold Value |
•
Compare ratio of Expected Area to Actual Area < 0.35 | |
Diagnosis Time |
•
- | |
Mil On Condition |
•
2 trips |
※ S1 : upstream oxygen sensor / S2 : downstream oxygen sensor
