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Home >> Lexus >> 2017 >> GX 460 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes) (3 Of 7) >> SFI System >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1); DTC P0430: Catalyst System Efficiency Below Threshold (Bank 2) [08/2015 - 08/2022] >> Catalyst Location
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Catalyst Location

Fig 1: Catalyst System Components Location
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TEXT IN ILLUSTRATION

*1 Exhaust Manifold Assembly RH (TWC: Front catalyst) *2 Exhaust Manifold Assembly LH (TWC: Front catalyst)
*3 Front Exhaust Pipe Assembly (TWC: Rear catalyst) *4 Front No. 2 Exhaust Pipe Assembly (TWC: Rear catalyst)
*5 Center Exhaust Pipe Assembly *6 Tailpipe Assembly
*7 Air Fuel Ratio Sensor (for Bank 2 Sensor 1) *8 Air Fuel Ratio Sensor (for Bank 1 Sensor 1)
*9 Heated Oxygen Sensor (for Bank 2 Sensor 2) *10 Heated Oxygen Sensor (for Bank 1 Sensor 2)