DTC P0420: Catalyst Efficiency Below Threshold (Bank 1): Notes

NOTE: Limited information available from manufacturer.

NOTE: Bank 1 is located on right side of engine and may be referred to as Bank "A". Bank 2 is located on left side of engine and may be referred to as Bank "B".

NOTE: After each repair, clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES/ECM RESET PROCEDURE under SELF-DIAGNOSTIC SYSTEM. Turn ignition off and then on. Read DTCs to verify repair is complete. For DLC and ECM connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagrams and all other terminal identification, see WIRING DIAGRAMS .