Home >> Lexus >> 2021 >> LX 570 >> 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) [08/2017 - 08/2018] >> Catalyst Location