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Home >> Toyota >> 2019 >> Sienna SE, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Engine Control System [2GR-FE] - Diagnostic Codes (2 Of 3)) >> SFI System >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1); DTC P0430: Catalyst System Efficiency Below Threshold (Bank 2) [12/2015 - 08/2016] >> Monitor Strategy

Monitor Strategy

WARNING: This page is about a different car, the 2016 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
Related DTCs P0420: Catalyst deterioration (bank 1)
P0430: Catalyst deterioration (bank 2)
Required Sensors / Components (Main) Air fuel ratio sensor and heated oxygen sensor
Required Sensors / Components (Related) Intake air temperature sensor, mass air flow meter, crankshaft position sensor and engine coolant temperature sensor
Frequency of Operation Once per driving cycle
Duration Approximately 30 seconds
MIL Operation 1 driving cycle
Sequence of Operation None
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