However, if the total of your driving faults is sixteen or more, you will fail, even if there are no serious or dangerous faults.
If you keep repeating the same driving fault (for example, stalling), the examiner will see that you have a problem with your skills in that area and will mark that as a serious fault - which will result in a fail.
A serious fault will result in failure. Even if you make only one fault on test, if it is a serious fault - you fail.
A serious fault is something which could cause danger or inconvenience to another road user.
A dangerous fault will definitely result in failure. Even if you make only one fault on test, if it is a dangerous fault - you fail.
A dangerous fault is something which causes real danger to another road user or yourself. It could be evasive action the driving examiner or another road user has being forced to take to avoid an actual crash from happening.