I have a 2006 Polo S 64 1.2 petrol with a 3 cylinder engine... since December the engine warning light intermittently flashes either when the engine is idling or when I've been driving for 10-15 minutes. When idling, it has misfired on 2 occasions, but turning the car on and off again solves the problem. I tend to turn the engine off at traffic lights now. When driving, revving the engine hard stops the light flashing! Mostly, the above 2 solutions make the light go away, if it stays on, it goes off again after a couple of days. My local garage has had a look and couldn't find a problem even when they ran a diagnostic. From reading reviews from other Polo owners, this seems to be a common problem but no-one seems to be able to put their finger on what the problem is! I'd like to sell it, but not sure how to do that other than selling it as spares or repairs, but even then, I've no idea of value. Any help anyone can offer would be much appreciated! Thanks.