DTC P0420: Catalyst System Efficiency Below Threshold (A/T Only): Notes

WARNING: This page is about a different car, the 2002 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Bank No. 1 refers to bank which includes cylinder No. 1. Bank No. 2 refers to bank without cylinder No. 1. Air/Fuel (A/F) sensor refers to sensor closest to engine block. HO2S No. 2 refers to sensor farthest from engine block.

NOTE: For component location, see appropriate illustration in THEORY & OPERATION article.