GMC Sonoma P Codes (Powertrain) P0400 - P0499 P0420

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P0420

2001 GMC SONOMA
I Have A 2001 Gmc Sonoma 2wd 2.2 Liter And Have The P0420 Code For Catylyst Efficiency Low Bank One.. I Have A New Cat And Rear O2 Sensor So...
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Asked by tallman1781

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P0420P0449

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