You could try taking it to P&R on Kirkstall road, not the cheapest indie going but pretty good and they have all the gear to read the codes.
If you prefer a full stealer then Clive Brooks on canal road in Bradford is one of the better ones around here. Also cheap for spares if you go via their ebay shop.
The stealer who tried to screw you and then argued amongst themselves - Harratts Leeds by any chance
They're the biggest set of t*@^$s I've ever had the misfortune to deal with.
The Wakefield branch has a better manager but I'd only use Harratts again as a last last last last last last resort! Actually I'd scrap the car before I went back to them!