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Recent questions tagged catalyst-efficiency-below-threshold

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P0420 Volkswagen -
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P20EE Ford - Need help what this code mean?
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P0430 Jeep - Appearing with other codes
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replace catalist bank 2
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P0420 2012 Ford Fusion -
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P0421 porbably not cat
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ford 5.2 02 sensor location
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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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code p0420 and p0430, bad cat or bad sensor?
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2004 nissan pathfinder armada le
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P0420 2002 TOYOTA SIENNA
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