Home >> Lexus >> 2021 >> LC 500h >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (5 Of 9) >> SFI System >> DTC P0420-00: Catalyst System Efficiency Below Threshold Bank 1; DTC P0430-00: Catalyst System Efficiency Below Threshold Bank 2 [01/2017 - 04/2020] >> Typical Malfunction Thresholds