Lexus ES300 - P0420 DTC - Catalyst System Efficiency Below Threshold Bank 1

CEL, TRAC OFF dash lights, car drives fine/like normal
October 2016 - Bank 1 Sensor 1 Air/Fuel Ratio Sensor Replacement
[DENSO 234-9021 Air/Fuel Ratio Sensor]
November 2016 - Lexus ES300 Catalytic Converter Replacement
[MagnaFlow Direct-Fit Catalytic Converters 444019]
February 2019 - Bank 1 Sensor 2 Oxygen Sensor Replacement
[DENSO 234-4137 Oxygen Sensor]
CAT is bad already ? Any ideas ? What to do ?
Reply to

Site Timeline Threads

MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.