• Internet diagnosis required...

    2015 Audi A4 Avant, Quattro. Very high fuel consumption. On average using 14-15 litres per hundred kilometres (roughly 16mpg).

    This is with normal driving, tyres at correct pressure and no roof racks. Even on a motorway trip it struggles to get 21 mpg.

    It should be a lot better. I suspect a boost leak somewhere. Any other ideas? I have 9 months of warranty left so will be getting Audi to cover it but I need to be armed with information.

  • Get audi to check the ecu software is the latest, if it has been overfueling for a long time the cat could be fucked.

    Edit what does the airfilter look like.

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