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You have to connect to the engine controller to read codes from it. It sounds like you are reading codes from the BCMDoes anyone know what I am doing wrong with alfaOBD. I have a check cap and day later got a CEL. I know it has to be the evap? My issue is why when I clock on the check engine in alfaobd and pull codes all I see is a short from my third break light. Why isn’t Alfa showing me the evap codes? Am I possibly doing something wrong?