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] >> Catalyst Location

Catalyst Location

WARNING: This page is about a different variant/trim than selected.
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*1 Air Fuel Ratio Sensor (Sensor 1) *2 Air Fuel Ratio Sensor (Sensor 2)
*3 Exhaust Manifold *4 Front Exhaust Pipe Assembly
*5 Tail Exhaust Pipe Assembly *6 TWC: Front Catalyst
*7 TWC: Rear Catalyst - -
NOTE:

When replacing the exhaust manifold (*3) and the front exhaust pipe assembly (*4) in order to replace the three-way catalytic converter, it is not necessary to replace the air fuel ratio sensor (sensor 1) (*1) and the air fuel ratio sensor (sensor 2) (*2).