If you have tried to read your car with your phone and you are not getting any results, It is quite likely a Low Frequency card, so if you can tell us any information about the card and reader or post a photo of your card and reader, we can certainly try to help you out.
To get a better understanding about the technology, follow @turbo2ltr link above.
Also if you find it easier to communicate in Italian, the forum has a translation plugin