P0420 Code Comes And Goes

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2012 Ford F150 P0420 Code

Code p0420 catalyst efficiency below threshold (bank 1), 51% off Volkswagen w/ downpipe P0420 code is a diagnostic trouble code that appears on vehicles

Meaning & fix for catalyst system efficiency below threshold bank 1

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How to fix honda p0420 code: catalyst system efficiency below threshold

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P0420 code: what it is and how to fix it, 51% off

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What are the causes of the p0420 code?

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