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p0491

  1. P0491 Can't pass emmisions

    E39 M5 and E52 Z8 Discussion
    Hey guys, So I've got the carbon build up code and I can't pass emissions testing (P0491). I don't feel like removing the heads right now so I'm thinking a tune with the SAP delete is the way to go. Are there companies that just offer a SAP Delete option with nothing else? I don't really want to...
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