Which catalytic converter needs to be replaced

Question

My check engine light came on for my 2000 Toyota 4Runner. Took it to Auto Zone to get a code and it came back as P0420. Was told by an independent mechanic that my catalytic converter was bad. I have 3 catalytic converters for my car. Wanted to know which catalytic converter needs to be replaced?

Answer 1

Hi there

This code is for the bank 1 catalytic converter. This is the passenger side of the engine and the converter right off the exhaust manifold. The converter is in between the 2 O2 sensors on that side.