California applies three separate Vehicle Code sections to drivers under 21, and they carry different thresholds and different consequences. Knowing which section applies to a specific arrest matters because the charge determines what the prosecution must prove, what the DMV can act on, and what penalties are on the table.

Zero Tolerance: Vehicle Code Section 23136

California’s zero-tolerance law makes it a civil offense for any driver under 21 to operate a vehicle with a BAC of 0.01 percent or greater. Section 23136 is primarily an administrative matter: its direct consequence is a one-year DMV suspension of driving privileges. It doesn’t carry the same criminal fines or jail exposure as the sections below, and its penalties are distinct from those that apply under other charges that may arise from the same stop.

Underage DUI: Vehicle Code Section 23140

A driver under 21 with a BAC of 0.05 percent or higher can be charged under Section 23140. This infraction-level offense carries its own set of possible consequences, which may include fines, a one-year license suspension, and a mandatory alcohol education program. The specific penalties that apply depend on the charge, the facts, and current California law.

Standard DUI: Vehicle Code Section 23152

If a driver under 21 tests at 0.08 percent BAC or higher, or if the evidence shows impairment regardless of BAC, the case may be charged as an adult DUI under Section 23152. Adult DUI charges can carry criminal penalties. A first-offense conviction under this section may involve fines, probation, license suspension, and potential jail time, among other consequences. The specific outcome depends on the facts of the case and the charge at issue.

Refusal to Submit to Testing

Refusing a preliminary alcohol screening test or chemical test carries its own DMV consequences under California’s implied consent law. For a first offense, refusal can result in a one-year suspension, and the consequences increase with prior events. A refusal doesn’t eliminate the case and may complicate the defense, so the facts surrounding any test request should be reviewed carefully.

The Separate DMV Process After an Underage DUI Arrest

Many families focus on the court case and overlook the DMV action running alongside it. These are two distinct proceedings with different rules and different outcomes. A resolution in court doesn’t automatically undo a DMV suspension, and the DMV timeline doesn’t pause while court proceedings develop.

After an arrest or citation that triggers an Administrative Per Se suspension, the driver generally has 10 days from receipt of the suspension notice to request a DMV hearing. That date should be verified against the actual notice received, because missing the deadline can affect available hearing rights. The DMV hearing addresses the driving privilege and the circumstances of the arrest. It doesn’t determine criminal guilt.

We handle both the court matter and the DMV proceeding. That allows us to review the stop, testing, and deadlines across both proceedings from the start.

Reviewing the Evidence in an Underage DUI Case

Every underage DUI case starts with the same question: what does the evidence actually show? A BAC reading doesn’t end that inquiry. The reason for the traffic stop, the sequence and timing of field tests, how the preliminary alcohol screening device was administered and maintained, the calibration records for the breath instrument, how a blood sample was collected and stored, and whether required procedures were followed at each step are all part of the review.

Vincent Tucci is certified in Standardized Field Sobriety Tests under National Highway Traffic Safety Administration standards and certified in the administration, calibration, and maintenance of the Intoximeter Alco-Sensor IV, the preliminary alcohol screening device used in the field. He has personally tried more than 100 DUI jury trials and has more than 25 years of experience handling DUI cases. Our firm’s focus on DUI and DMV defense means forensic challenges to breath and blood testing equipment, calibration requirements, and California DUI statutes are a regular part of our case review.

Field sobriety test performance can be affected by physical conditions, fatigue, stress, footwear, lighting, and road surface, none of which may indicate alcohol impairment. Whether any particular defense applies depends on the evidence and the facts of the individual case.

Consequences Beyond the Courtroom

An underage DUI arrest can affect more than the court record. For a young driver in Mission Viejo, a license suspension may interrupt transportation to school, a job, or other obligations. Insurance consequences, school disciplinary processes, scholarship eligibility, and background check implications may also follow, depending on the charge, the resolution, the driver’s age and history, and the policies of the relevant institution or insurer.

We keep families informed throughout the process. Understanding what is actually at stake in a specific case is different from reading a list of worst-case scenarios. We explain what the evidence shows, what each proceeding requires, and which options may be available.

Underage DUI FAQs

Can I go to jail for an underage DUI in California?
Jail exposure depends on which charge applies. Cases under Vehicle Code Section 23136 or Section 23140 generally don’t carry jail time. If the charge is an adult DUI under Section 23152, or if the arrest involves an accident or injury, jail becomes a possibility. The applicable charge and the facts of the case determine actual exposure.

Will My Parents Be Notified If I’m Under 18?

Parent or guardian involvement in a minor’s legal matter depends on the type of proceeding and the court. Whether juvenile or adult proceedings apply, and what participation the court requires, varies based on the driver’s age, the charge, and case-specific circumstances.

Can an Underage DUI Be Expunged or Sealed?

Record sealing, expungement, and related relief aren’t automatic. Eligibility depends on the charge, the resolution, whether the matter proceeded in juvenile or adult court, and current California law. These questions should be addressed in the context of the specific case rather than assumed from general information.

Should I Hire an Attorney for an Underage DUI?

A juvenile DUI lawyer in Mission Viejo can review the separate court and DMV issues, identify applicable deadlines, and explain the options available in the specific case.