just confirm that it was a lamda sensor that was causing your limp mode because im sure a decat wont cause you to go into limp..??yes i get limp to but no light, if your getting the light it must be the lamba gone, when the lamba goes it throws all the reading off as the ECU is getting the wrong reading form the lamba and it makes it think its running to lean and alsorts of thing. see wat reading the lamba is putting out with your vag-com.