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Home >> Lexus >> 2021 >> RC F Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (4 Of 9) >> SFI System >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1); DTC P0430: Catalyst System Efficiency Below Threshold (Bank 2) [09/2014 - 10/2015] >> Catalyst Location

Catalyst Location

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*1 Air Fuel Ratio Sensor (Bank 1 Sensor 1) *2 Air Fuel Ratio Sensor (Bank 2 Sensor 1)
*3 Heated Oxygen Sensor (Bank 1 Sensor 2) *4 Heated Oxygen Sensor (Bank 2 Sensor 2)
*5 TWC: Front Catalyst *6 TWC: Rear Catalyst
*7 Front Exhaust Pipe Assembly *8 Tail Exhaust Pipe Assembly
*9 Tail Exhaust Pipe LH *10 Exhaust Manifold Sub-assembly RH
*11 Exhaust Manifold Sub-assembly LH - -
NOTE:
  • If DTC P0420 is output, replace the exhaust manifold sub-assembly LH (*11) and the front exhaust pipe assembly (*7) together when catalyst replacement is necessary (Excluding air fuel ratio sensor*1 and heated oxygen sensor*3).
  • If DTC P0430 is output, replace the exhaust manifold sub-assembly RH (*10) and the front exhaust pipe assembly (*7) together when catalyst replacement is necessary (Excluding air fuel ratio sensor*2 and heated oxygen sensor*4).