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Sienna Catalytic Converter Bank 1 issue

posted Jul 29, 2016, 9:00 AM by Quoc-Anh Vuong
Today, while driving to have the car ready for Emission Control Tests, the CEL lit up with the code P0420. 
We addressed the P0430 by replacing the A/F sensor, and the catalytic converter of bank 2; now the bank 1 needs attention