Hello, I am a newbie and I just brought a 96 Contour LX with a 2.5L Duratec Engine. It has 116,000 miles on it, and it runs just fine. The problem is with the check engine light. It came on shortly after I brought it. I took it to my mechanic and he told me that I have CEL code P0153, P0171, and P0174. Does this mean I have a Lemon? What should I so? Also my car has traction control but the light never comes on. I think it works because I herd a loud noise while driving in the snow. Is the light dead? Can some one help me? Thanks!!!