Home >> Lexus >> 2007 >> IS 350 >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (2GR-FSE) - DTC P0136 - P0604 >> DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1); DTC P0430 Catalyst System Efficiency Below Threshold (Bank 2) >> Typical Malfunction Thresholds