Catalyst Monitor
Operation
CATALYST MONITOR OPERATION
| DTCs | P0420 (for Bank 1) / P0430 (for Bank 2) |
| Monitor execution | Once per driving cycle |
| Sensors / components OK | MAF, TP, ECT, IAT, Barometric pressure, Back-up Power, Primary / Secondary HO2S, Primary / Secondary HO2S heater |
| Monitoring Duration | Min 36 s |
Enable conditions
CATALYST MONITOR ENABLE CONDITIONS
| Parameter | Minimum | Maximum |
|---|---|---|
| Engine coolant temp. | 74 (165) °C (°F) | 110 (230) °C (°F) |
| Engine speed | 1500 rpm | 3750 rpm for M/T 3500 rpm for A/T |
| Engine speed change | 188 rpm / 25 ms | |
| Calculated load value | 15% | 50% |
| MAF | 7.5 g/s for M/T model 6.0 g/s for A/T model |
|
| MAF change | 15 g/s / 25 ms | |
| IAT | -8 (17.6) °C (°F) | |
| Barometric pressure | 74.5 kPa | |
| Catalyst warmed-up counter | 53248 | |
| Primary/Secondary O2 slice level change | 0.1 V | |
| Common prohibition mode | Off | |
| Misfire | No DTC | |
| EGR system monitor | No DTC | |
| Fuel system monitor | No DTC | |
| Fuel system status | Closed loop mode | |
| Dual O2 system status | Closed loop mode | |
Typical malfunction thresholds
CATALYST MONITOR TYPICAL MALFUNCTION THRESHOLDS
| Deviation rate of integration of primary and secondary HO2S signals > 50% |