P0420 Code Comes And Goes

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No code? Spins me for a loop when p0420 goes away : r/WRX

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Code p0420 catalyst efficiency below threshold (bank 1), 51% off2012 ford f150 p0420 code What are the causes of the p0420 code?P0420 code comes and goes after replacing the catalytic converter.

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P0420 code is a diagnostic trouble code that appears on vehicles

Volkswagen w/ downpipeP0420 engine code 2014 chevy equinox P0420 honda accord – the cat converter failure code. what to do?2008 honda accord p0420.

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