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No, evolve's tune will bypass the CEL/codes. It will overwrite your previous tune all though i recommend flashing to stock before flashing to another company's tune. AA's newest tune will net you 7/8 emissions system's ready for inspection which will pass in most of the USA, but no idea what other country's emissions requirements/testing are.
You can also just run o2 defoulers to eliminate the CEL. Apparently our computers are finicky and you will need to test several sets before you find one that works.
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08 e93 335i MT
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