[Opiate]

Hello all, I have a couple questions that I would like everyone's advice on. My check engine light has been on for a couple of weeks now. My codes are P1684, P0455, and P1193. I know 1684 is the battery was disconnected code. Has anyone had and fixed themselves either of the other two? 0455 is a large evap system leak and 1193 is inlet air temp sensor voltage wrong. I went to the dealer today and they quoted me $90.00 just to look at it. I really do not want to pay this much just for a diagnosis. I have tried disconnecting the neg battery cable and it was fine for a few days, but the light came back on. Any advice on what to do next I would appreciate tremendously. Thanks everyone.