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What is the P430 error code on a 2003 Toyota Highlander?

Updated: 11/2/2022

Wiki User

∙ 9y ago

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That code means that the oxygen sensor downstream of the catalytic converter on bank 2 is detecting that the converter is not working as efficiently as it should be. It could be a bad oxygen sensor, a bad catalytic converter or and exhaust leak.

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∙ 9y ago

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"Three Way Catalytic Converter (TWC) system low efficiency Bank 2"

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