Had my car pluged in to a computer at my vw garage and it showing n75 and oxigen sensor failure, my car is spitting and spluttering at high revs,. What is the problem, I have a bailys dumpvalve fitted so would that throw the n75 code up? It's confusing, Ino I have to order the oxigen sensor now as it needs done.but will that resolve my problem? Also is it worth having the n249 bypass done, need advice big time??
