Home >> Lexus >> 2024 >> LX 600 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (W/O Canister Pump Module) - Diagnostic Codes (3 Of 5) >> SFI SYSTEM (w/o Canister Pump Module) >> DTC P0420-00: Catalyst System Efficiency Below Threshold Bank 1; DTC P0430-00: Catalyst System Efficiency Below Threshold Bank 2 [12/2021 - ] >> Typical Malfunction Thresholds