I doubt that you have any obligation to tell the probation officer about a mere traffic ticket, but if it is a traffic misdemeanor (a criminal offense) you would normally be required to tell your P.O.

So clarify the charges with your lawyer, and find out if this is something you have to report. If you are convicted of a crime, no matter how minor, you should assume that your probation officer will eventually find out about it. And if the probation officer is surprised, the consequence to you may be significantly less pleasant than that from voluntarily informing your P.O.

Probation violations are normally handled by the sentencing court, which is not likely to be the court which handles your traffic ticket.