Getting a DUI while you are already on probation in California triggers two simultaneous legal problems: a new DUI charge under Vehicle Code § 23152, and a probation violation under Penal Code § 1203.2. Cases involving Rancho Cucamonga residents are prosecuted by the San Bernardino County District Attorney's office and heard at the West Valley Justice Center at 8303 Haven Avenue. You also have only 10 days from the date of arrest to request a DMV Administrative Per Se (APS) hearing — if you miss that deadline, your license is automatically suspended. Kirk Tarman has handled DUI cases and probation violation matters at this courthouse for more than 25 years. Call 24/7 for a confidential consultation: (909) 658-7341.
You Are Now Facing Two Separate Legal Proceedings
Most people do not realize that a DUI while on probation creates two distinct cases that run at the same time:
1. The new DUI criminal case under Vehicle Code § 23152 — this proceeds through the West Valley Justice Center like any other DUI arrest, with arraignment, preliminary hearing, and potential trial.
2. A probation violation hearing under Penal Code § 1203.2 — the court that placed you on probation can hold a separate hearing to determine whether you violated the terms of your probation. This is a lower standard of proof than a criminal trial — the judge only needs to find a violation by a preponderance of the evidence, not beyond a reasonable doubt.
Both proceedings can result in punishment independently of each other. You can be penalized at the probation violation hearing even if the new DUI charge is eventually reduced or dismissed.
The 10-Day DMV Deadline — Do Not Miss This
Within 10 days of your DUI arrest, you or your attorney must contact the California DMV to request an Administrative Per Se (APS) hearing. If you do not request this hearing within 10 days, the DMV will automatically suspend your driver's license — regardless of what happens in criminal court.
The APS hearing is a separate administrative proceeding that determines whether your license will be suspended. It is not the same as your criminal case. The Law Offices of Kirk Tarman & Associates has a DMV DUI expert on staff and handles APS hearings regularly. Acting within the 10-day window is critical.
What DUI Probation Terms Are Being Violated?
Under California law, a standard DUI probation agreement — governed by Vehicle Code § 23600 — requires that you:
- Do not drive with any measurable amount of alcohol in your system (a 0.01% BAC limit applies, rather than the standard 0.08%)
- Submit to a chemical test if lawfully stopped
- Do not commit any additional criminal offenses
A DUI arrest while on DUI probation is a direct violation of all three conditions simultaneously. Even if your BAC was below 0.08%, a reading above 0.00% can still constitute a probation violation.
Penalties for a DUI While on Probation
On the New DUI Charge
A new DUI while on probation is treated as an aggravated offense. Penalties are enhanced beyond what a first-time offender would face:
- Mandatory jail time — even for a misdemeanor, a judge is likely to impose actual jail time rather than probation
- Longer license suspension — the DMV applies enhanced suspension periods for probationers
- Extended DUI school — a 30-month DUI education program is typically required (versus 3 or 9 months for first offenders)
- Ignition Interlock Device (IID) — mandatory installation on any vehicle you drive
- Higher fines — court fines and penalty assessments are increased
If this is your second, third, or fourth DUI within 10 years, it will be counted as a prior offense and penalties escalate further under California's DUI enhancement statutes.
On the Probation Violation
At the probation violation hearing, the judge has broad discretion. Possible outcomes include:
- Reinstatement of probation with new, stricter conditions
- Extended probation period
- Modification adding jail time, home confinement, or electronic monitoring
- Revocation of probation and imposition of the original suspended sentence — meaning you could be ordered to serve the jail or prison term that was set aside when you were first placed on probation
If you were on felony probation — for example, from a prior felony DUI or another felony offense — revocation can mean serving a state prison sentence.
How This Affects Your DMV Record
California maintains a 10-year DUI lookback period. Any DUI conviction within 10 years of a prior DUI conviction counts as a "prior" for sentencing purposes. A second DUI conviction carries:
- Mandatory minimum 96 hours in jail (up to one year)
- 18 or 30-month DUI education program
- Two-year license revocation (with possible restricted license after 90 days with IID)
A third conviction is a misdemeanor but treated more like a felony — 120 days to one year in jail, 30-month DUI school, and a three-year license revocation.
Defense Strategies
Challenge the traffic stop. If the officer lacked reasonable suspicion to stop your vehicle, all evidence gathered afterward — including chemical test results — may be suppressible.
Challenge the chemical test. Breathalyzer devices must be properly calibrated and maintained. Blood test results can be challenged based on chain of custody, storage conditions, and laboratory procedures. Kirk Tarman's team includes a DMV DUI expert who is experienced in identifying weaknesses in chemical test evidence.
Challenge the field sobriety tests. Standardized field sobriety tests are affected by fatigue, medical conditions, uneven surfaces, and footwear. Performance on these tests is subjective and can be challenged.
Argue that the probation violation and the new charge should be resolved together. In some cases, a negotiated resolution on the new DUI can limit or eliminate additional punishment at the probation violation hearing.
Seek alternative sentencing. In appropriate cases — particularly where the defendant has otherwise complied with probation conditions — an attorney can advocate for alternatives to incarceration such as residential treatment, home confinement, or community service.
Frequently Asked Questions
Can I be found in violation of probation even if the new DUI charge is dropped?
Yes. A probation violation hearing uses a lower standard of proof than a criminal trial. The prosecution only needs to prove the violation by a preponderance of the evidence — meaning it is more likely than not that you violated your probation terms. An acquittal or dismissal of the DUI charge does not automatically resolve the probation violation.
Does the 10-day DMV rule still apply if I was on probation?
Yes. The 10-day deadline to request an APS hearing applies to every DUI arrest, regardless of your probation status. Missing it results in automatic license suspension.
What if my probation was for a non-DUI offense?
Getting a DUI while on probation for any offense — not just a prior DUI — is still a probation violation under Penal Code § 1203.2. The condition "do not commit any additional criminal offenses" applies to all probation agreements. The court has the same discretion to revoke, modify, or extend your probation.
Will I automatically go to jail?
Not necessarily. While jail time becomes significantly more likely when a new DUI is charged while on probation, the outcome depends on many factors — including the specific probation conditions, the strength of the evidence against you, your prior record, and what defenses are available. An experienced attorney can evaluate your situation and identify every available option before a hearing occurs.
How quickly should I contact an attorney?
Immediately. The 10-day DMV deadline begins running from the date of arrest. Missing it cannot be undone. The earlier an attorney is involved, the more options are available — including the possibility of pre-hearing negotiations and the preservation of evidence.
Contact Kirk Tarman — Available 24/7
If you or a family member has been arrested for a DUI while on probation in Rancho Cucamonga or anywhere in San Bernardino County, contact The Law Offices of Kirk Tarman & Associates immediately.
Kirk Tarman has practiced criminal defense at the West Valley Justice Center for more than 25 years. The firm has a DMV DUI expert on staff and handles both the criminal and DMV sides of every DUI case. All consultations are strictly confidential.
Written by Kirk Tarman | Criminal Defense Attorney | State Bar #203966 | Licensed 1999 | The Law Offices of Kirk Tarman & Associates
The information on this page is for general informational purposes only and does not constitute legal advice. Reading this page does not create an attorney-client relationship. Laws and procedures change — contact our office directly for advice specific to your situation.