Monitor Strategy
MONITOR STRATEGY
| Related DTCs | P0420: Catalyst Deterioration P0420: Catalyst Deterioration |
| Required Sensors/Components (Main) | TWC |
| Required Sensors/Components (Sub) | A/F sensor, heated oxygen sensor, intake air temperature sensor, mass air flow meter, crankshaft position sensor and engine coolant temperature sensor |
| Frequency of Operation | Once per driving cycle |
| Duration | 30 seconds or more |
| MIL Operation | 2 driving cycles |
| Sequence of Operation | None |