DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 50 (Engine Control System (A25A-FXS) - Diagnostic Codes (P0400-P0450)) >> SFI System >> DTC P0420-00: Catalyst System Efficiency Below Threshold Bank 1 [12/2019 - 10/2022] >> Monitor Strategy

Monitor Strategy

WARNING: This page is about a different variant/trim than selected.
Related DTCs P0420: Catalyst deterioration
Required Sensors/Components (Main) Air fuel ratio sensor (sensor 1)
Air fuel ratio sensor (sensor 2)
Required Sensors/Components (Related) Intake air temperature sensor
Mass air flow meter sub-assembly
Crankshaft position sensor
Engine coolant temperature sensor
Frequency of Operation Once per driving cycle
Duration Approximately 30 seconds
MIL Operation Immediate
Sequence of Operation None