Appologies if the question has been asked before and I've not spotted it.
In an ideal world we would all have a VCDS diagnostic tucked away at the back of the garage but personally I can't stretch to one knowing it will probably only get used once in a blue moon. So the question is, is it worth buying a cheapie (
say, sub £40) just to read hard faults? Or would you be better spending the money at a local garage and getting it read with a decent bit of kit?
So knowing next to nothing about vehicle diagnostics will "Faults" always make something light up on the instrument panel or are some silent and simply stored in memory until scanned?
I have a slight issue with my Polo 1.2TSi in that the tick-over has become slightly erratic/unsteady. Car runs fine otherwise) I was just wondering if that is the sort of issue that would flag a fault code on a cheap & cheerful reader?
One that caught my eye. Ideally something that would read real-time data would be useful. Just guessing but I suspect I have a MAP fault or temp transponder.