Hi all thanks for trying to help. I have a 55 reg a3 8p 2.0t just wondering would a split diaphragm diverter valve bring a fault code up or not I am assuming it's got the original one on read a lot about these rev d any help pointers tips would be great. I currently have no fault codes but just sometimes seems to lang on boost from what I can work out just being under car it's got rev b diverter valve
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