Have had the MIL on a while now -- vehicle is running fine. When I do the OBD code check with key, I don't get any code just the dashed lines and a "done". Does anyone know what this means? Is it possibly a bad fuse (and if Y - does anyone know which one as I didn't see it directly indicated)? or are there simply issues that don't display any code? Appreciate any help and assistance. Thanks.