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Emmisions code p0420 and p0175 - 1500 Chevrolet Cars & Trucks

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Please follow this link for an explanation of these codes, they are related to the catalytic converter(s) and to fuel mixture control. http://www.fullsizechevy.com/forums/archive/index.php/t-70769.html

Posted on Jul 31, 2008

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What means catalyst Efficiency below normal


      Got it scanned and it's P0420: Catalyst efficiency below thresholdbank 1. They said it could be a bad catalytic converter or oxygen sensor. I borrowed a scanner and tried to measure the oxygen sensor readings over time.Sep 8, 2011

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04 ram has 2 codes p0068 p0175


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Which o2 sensor to change for codes p0420 in 2005 mazda 3 where the catalyst is missing


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Which makes a mockery of europeon anti poloution laws let alone californian controls .These middle east countries should be forced to introduce emmision control laws .

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4_5_2012_6_18_20_pm.jpg4_5_2012_6_18_37_pm.jpg4_5_2012_6_18_51_pm.jpg

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1 Answer

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