please help, i have read most of the diagnosis listed on a lot of the websites regarding the 17705 code and still no joy, the car is an audi convertible on a 06 plate, done about 60,000miles, the old turbo had a lot of damage to the compressor wheel so it was meant to be just a simple replacement, although it had the fault code then i thought i would be rid of it once i replaced the turbo but unfortunately no joy, i have looked at the intake pipes and see no apparent leaks, just wondering if anyone else has been through the same fault on such a new car, if so any suggestions would be welcomed and much appreciated...ta...doc