I am having problems with my Audi A3 1.6 SE (51 reg) 56000 miles. It is spluttering in 2nd and 3rd gear and sometimes when i pull off in 1st. I have changed the mass air flow sensor, lambda prob and today changed the coil pack. When it is pluged into the laptop it is giving code 16514 which i beleive is o2 sensor bank A. It is also saying that the engine is miss fireing on most of the cylinders. Any sugestion or solutions would be a big help as im not looking forward to paying Audi prices on a car that is only worth around Ł2500.