If there is an abnormal response rate of HO2S under enable conditions, the ECM/PCM sets DTC P0133.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Slow response - Check Lambda Signa Amplitude | 1. Poor connection 2. Leak or clog in intake air system 3. Injector 4. Fuel pressure 5. HO2S(S1) |
Enable Conditions |
•
Sensor pump current valid No SPI(Serial Peripheral Interface) communication fault, P0606 & Battery Voltage > 10V & Sensor Tip Temperature > 650°C
•
O2 sensor Forced stimulation active
•
P0420(Catalyst Diagnosis) monitoring active P0133 diagnosis is synchronized with P0420 monitor. | |
Threshold Value |
•
Integral ( Lambda signal amplitude measured / Lambda signal amplitude of a slow sensor) > 1 | |
Diagnostic Time |
•
15 lambda controller cycles(SULEV) | |
Mil On Condition |
•
2 driving cycles. |
※ S1 : upstream oxygen sensor / S2 : downstream oxygen sensor
