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Home >> Lexus >> 2017 >> GS 350 Base, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System - Diagnostic Codes (4 Of 7) >> SFI System >> DTC P0420-00: Catalyst System Efficiency Below Threshold Bank 1; DTC P0430-00: Catalyst System Efficiency Below Threshold Bank 2 [10/2015 - 09/2016] >> Catalyst Location
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Catalyst Location

GTY676920Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
*A for 2WD *B for AWD
*1 Exhaust Manifold Sub-assembly RH (TWC: Front Catalyst) *2 Exhaust Manifold Sub-assembly LH (TWC: Front Catalyst)
*3 Air Fuel Ratio Sensor (Bank 1 Sensor 1) *4 Air Fuel Ratio Sensor (Bank 2 Sensor 1)
*5 Heated Oxygen Sensor (Bank 1 Sensor 2) *6 Heated Oxygen Sensor (Bank 2 Sensor 2)
*7 Front Exhaust Pipe Assembly (TWC: Rear Catalyst) *8 Tailpipe Assembly RH
*9 Tailpipe Assembly LH - -
NOTE:
  • If DTC P0420-00 is output, replace the exhaust manifold sub-assembly RH (*1) and the front exhaust pipe assembly (*7) together when catalyst replacement is necessary (Excluding air fuel ratio sensor *3 and heated oxygen sensor *5).
  • If DTC P0430-00 is output, replace the exhaust manifold sub-assembly LH (*2) and the front exhaust pipe assembly (*7) together when catalyst replacement is necessary (Excluding air fuel ratio sensor *4 and heated oxygen sensor *6).