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Recent questions tagged p0420

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P0420 code 3 months after new CAT and 02 sensors installed?
asked Jun 16, 2017 by Steph Bri (102 points)
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P0011 code and p0420 on hyundai sonata 06 4 cyl
asked Jun 15, 2017 by
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What does Lexus RX300 code P0420 & B2796 mean?
asked Jun 14, 2017 by
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Code came on after Upgrading cold air intake
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P0420 Mazda -
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P0420 BMW -
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could bad plug wires cause po328 [knock sensor] to show code?
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does the altma 2.5 have a front catalytic coming off the manifold
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2001 I30 infinity wont start
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P0420 Ford - p0430
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P0420 2005 Nissan Maxima -
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P0420 Cadillac -
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p0420 code gmc 2003 1500 sierra 5.3L
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P0420 Toyota -
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