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Home >> Lexus >> 2021 >> LS 500 Base, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System - Diagnostic Codes (07 Of 14) >> SFI System >> DTC P0420-00: Catalyst System Efficiency Below Threshold Bank 1; DTC P0430-00: Catalyst System Efficiency Below Threshold Bank 2 [12/2017 - 10/2020] >> Catalyst Location
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Catalyst Location

GTY834270Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
*A for 2WD *B for AWD
*1 Converter Assembly RH (TWC: Front Catalyst) *2 Converter Assembly LH (TWC: Front Catalyst)
*3 Air Fuel Ratio Sensor (Bank 1 Sensor 1) *4 Air Fuel Ratio Sensor (Bank 2 Sensor 1)
*5 Air Fuel Ratio Sensor (Bank 1 Sensor 2) *6 Air Fuel Ratio Sensor (Bank 2 Sensor 2)
*7 Front Exhaust Pipe Assembly (TWC: Rear Catalyst) *8 Exhaust Tailpipe Assembly RH
*9 Exhaust Tailpipe Assembly LH - -
NOTE:
  • If DTC P0420-00 is output, replace the converter assembly RH (*1) and the front exhaust pipe assembly (*7) together when catalyst replacement is necessary (Excluding air fuel ratio sensor (sensor 1) *3 and air fuel ratio sensor (sensor 2) *5).
  • If DTC P0430-00 is output, replace the converter assembly LH (*2) and the front exhaust pipe assembly (*7) together when catalyst replacement is necessary (Excluding air fuel ratio sensor (sensor 1) *4 and air fuel ratio sensor (sensor 2) *6).