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ECU warning light issue

Beno72 Jul 20, 2018

  1. Beno72

    Beno72 B7

    Hi guys, is this a common fault. From time to time my ECU warning light comes on and the car runs like a dog. Then it seems to cure itself and everything is fine again. I’ve have a MRC stage two remap, the pre- cat removed and central resonator removed also. Any ideas?? Thanks all!
    2007 RS4 Avant

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