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Home >> Toyota >> 2022 >> Avalon XLE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 60 (Engine Control System - Diagnostic Codes [A25A-FXS] (P0400-P0520)) >> SFI System >> DTC P0420-00: Catalyst System Efficiency Below Threshold Bank 1 [04/2018 -] >> 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 Center Exhaust Pipe Assembly *6 Tail Exhaust Pipe Assembly
*7 TWC: Front Catalyst *8 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).