There are three different types of faults that can be marked in your Driving Test as follows:
A dangerous fault – this involves actual danger to either yourself, the examiner, another person or property such as a parked car. If you make a dangerous fault on your driving test you will fail.
A serious fault – this is something that could potentially be dangerous. If you make a serious fault on your test you will fail.
A driving fault – this is not potentially dangerous, however, if you make the same fault throughout your test it could become a serious fault. You are allowed to make up to 15 driving faults in your test and still pass. If you make 16 or more you will fail your driving test.