Toyota camryv6 catalyst efficiency problem solution

Question

I have a Toyota Camry2007 v6, my check engine light is on and diagnosis shows the catalyst efficiency of bank one is low please I without replacing it, what can I do fix it back to efficiently running condition?

Answer 1

HI there

In most cases replacing the converter on bank 1 is required to resolve the problem. However, a poorly running engine can cause the code as well as exhaust leaks and a problem with the rear O2 sensor.

P0420 TOYOTA - Catalyst System Efficiency Below Threshold Bank 1

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