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Recent questions tagged p0420

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what does a p0420 code mean on a 2006 chy paciric
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p0171, p0174, and p0420 active codes
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My car runs fine but when I come to a stop my idle drops and sometimes dies.
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can having major service and tune up cause a p0420 code
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im getting both codes p0420 and p0430
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Incomplete catalyst 2003 Toyota Tacoma V6 3.4L, pending P0420
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Code PO420 Toyota Corolla CE 2006
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2011 Highlander P0420 after filling up with diesel
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C1241 Toyota -
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P0420 Nissan -
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P0420 2003 Nissan Altima Sedan -
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P0302 P0420 P0170 Mazda 626 Not sure what should be first step
asked Jan 4, 2017 by
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