Buick La Crosse P Codes (Powertrain) P0400 - P0499 P0420

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Used An O2 Spacer. P0420

2005 BUICK LA CROSSE
Car Has Been Well Maintained With Records. I Got A P0420 Code. Ran A Couple Treatments With Cataclean. P0420. Used An O2 Spacer. P0420....
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Asked by dc70

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