If the HO2S signal voltage is fixed at rich status, then feedback control is no longer possible, the PCM sets DTC P2196.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Characteristic Monitoring | 1. Poor connector connection 2. Faulty upstream O2 sensor 3. Fuel leakage 4. Improper fuel pressure 5. Restricted intake system |
Enable Condition |
•
Catalyst Temp.(Model) is at 350℃(662℉) and 870℃(1598℉)
•
Required lambda 1 | |
Threshold Value |
•
Deviation value of air fuel ratio control is higher than -0.05 | |
Diagnostic Time |
•
40 sec. | |
MIL ON Condition |
•
2 driving cycles |
