Hi my first post so here goes ! I've found lots of useful info on this site but can't find a reason to why this keeps happing? First of i have a A4 cab 1.8t 2005 I brought it 7 months ago and have been very pleased. I had the cam belt changed at Audi about 500 miles ago. About 100 miles before this the emisson light came on and i took it someone with a vag com and they said it was a p0114 code Auxiliary air temp sensor circuit intermittent ? He said he would reset it and drive it to see how long it would take to come back on? Anyway i noticed it used a bit more fuel than normal . It came back on but this time a coil had gone so i had it replaced and the sensor went off. It had its MOT two weeks ago and passed nothing wrong at all . Two days later the light came back on they said it might be because of the emmison test during the MOT and reset it at a seat garage for me . It has just come back on again . I have never driven another 1.8t so am not sure if the power feels a bit low as it doesnt accelerate as well as i would have thought in lower gears. One advisor from Audi when they did the cam belt was lack of power to be investigated ? The problem i have is that i have no real spare money .. family etc so wanted to see if anyone could indentify the problem here so to keep the costs down on repair time etc?? Any news good or bad would be apprceiated Thanks Mj.