Has there been any resolve to this problem on here. I also have code P0121 which relates to throttle. I'm not convinced this is a co-incidence. This car has been sitting on a drive for about 4 weeks. Hasn't gone anywhere but I had to charge the battery before I could drive it for the first time 3 days ago. I can't take it anywhere however as I've no speedo. There is no symptoms of anything being wrong. I should also start this as a new thread seeing as yours was a few months back.