While on probation, a Defendant is subject to being sentenced. That is if you do not complete probation you can still be sentenced, to the maximum sentence. AS long as you keep your agreement and do not violate probation that will not happen. However, upon a showing that Defendant willfully violated their probation – the Judge can sentence you like you just plead guilty to the charge.
Probations Violation Hearings are technical, because of jurisdictional issues and requirements by the probation officer to accomplish a properly and timely filed affidavit of violation of probation. There is also the technical aspects of the violation itself and crucially how the case is resolved especially where the violation is a new crime allegation.
Probation Violations are dangerous and if you are alleged to have violated probation, you should talk to an attorney who has experience in this particular area.