What does code DTC P0420 mean on a 2000 Toyota Avalon emissions test? Has not passed inspection
HI there
This code means the catalytic converter isn't cleaning the exhaust as good as it should. Usually, this means the converter needs to be replaced. Here is some more info on it for you.
P0420 TOYOTA - Catalyst System Efficiency Below Threshold Bank 1 Read more: https://www.autocodes.com/p0420_toyota.html
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