First of all can I say a big hello to everyone as I am a new member and this is my first post and as you can probably figure out from the title I have a problem. I have just bought a 2007 tdi golf with the 105 hp engine and when you turn on the ignition error shows on the dashboard display. It has an aftermarket boy racer type air filter fitted and I wondered if this would make a difference? Also if the car is stationary it will not rev over 3000 rpm is his normal or could it be related to the error problem? Any replies /advice would be gratefully received. Many thanks Mel.