P0422: catalyst 2 efficiency below threshold (bank 1) [solved] p0422 code: fixing main catalyst efficiency below threshold bank 1 Ways to diagnose and fix the p0422 error code
2007 Mercedes-Benz Codes P0414-P2009-P0045-P0048-P2257-P0031-P0051
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Error code p0422: main catalyst efficiency below threshold (bank 1
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If you have codes p0442 & p0455 watch this video for a super easy fixP0442 mercedes-benz – przyczyny, objawy i rozwiązania dla wykrytego P0422: catalyst 2 efficiency below threshold (bank 1).
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2007 Mercedes-Benz Codes P0414-P2009-P0045-P0048-P2257-P0031-P0051

HOW TO FIX CODE P0442 ON A CAR - YouTube

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Po521 Code Chevy Silverado - www.inf-inet.com
CAN SOMEONE HELP? CODES P0400 & P0410 | Mercedes-Benz Forum

Chrysler Sebring Error Code P0422: Q&A on P2096 & Catalytic Converter
Fixed Problem from Code P0455 | Mercedes-Benz Forum

IF YOU HAVE CODES P0442 & P0455 WATCH THIS VIDEO FOR A SUPER EASY FIX