Underage DUI Lawyers in San Diego (VC 23136)

Under 21 and cited for DUI under California’s zero tolerance law? Even a BAC of 0.01% triggers a one-year license suspension. Our San Diego defense lawyers challenge these cases at DMV hearings. Call 24/7.

A charge under Vehicle Code Section 23136 changes everything for a young person in San Diego. One drink. One traffic stop. One preliminary breath test reading of 0.01% or above. That’s all it takes for California’s zero tolerance law to put a one-year license suspension on the table.

Most people facing this situation never imagined being here. A college student who had a single beer at a friend’s apartment before driving home. A young service member who thought the effects of a drink had worn off hours ago. A 19-year-old pulled over at a DUI checkpoint in Pacific Beach who had half a glass of wine at dinner. These aren’t hardened criminals. They’re young people who made a judgment call that California’s strict zero tolerance law doesn’t forgive.

Charges are accusations, not convictions. What happens next depends entirely on the defense you build and how quickly you act. And here’s something critical that most people don’t realize: you have only 10 days from the date of your citation to request a DMV hearing, or the suspension goes into effect automatically.

At David P. Shapiro Criminal Defense Attorneys, we’ve defended underage DUI cases throughout San Diego County, from administrative DMV hearings to criminal court proceedings when charges escalate. As experienced San Diego DUI defense lawyers, we understand the science behind preliminary breath testing devices, we know how to challenge results at the 0.01% threshold where even minor instrument errors make all the difference, and we’ve helped clients keep their licenses when the situation looked bleak.

Time matters. Early action creates options that disappear later. The 10-day DMV deadline waits for no one.

Quick Reference: VC 23136 Underage DUI (Zero Tolerance)

Classification	Civil/administrative violation (NOT criminal)
Jail/Prison	None
Criminal Fine	None
License Suspension	1-year suspension (or 1-year delay of issuance if unlicensed)
Criminal Record	None for standalone VC 23136 violation
Refusal to Submit to PAS Test	1-year suspension per VC 13353.1
DMV Hearing Deadline	10 days from citation to request hearing
Strike Offense	No

California’s Tiered Underage DUI System: Which Law Applies to You?

Here’s something that confuses a lot of people, and understandably so. California doesn’t have just one “underage DUI” law. There are three distinct statutes, and which one applies depends on your blood-alcohol concentration. Understanding the differences is essential because the consequences escalate dramatically at each tier.

Tier 1: VC 23136 (BAC of 0.01% or Greater)

This is California’s zero tolerance law.¹ It applies to anyone under 21 who drives with a BAC of 0.01% or above as measured by a preliminary alcohol screening (PAS) test or other chemical test. The critical thing to understand is that VC 23136 is not a criminal offense. It’s a civil, administrative violation handled entirely by the DMV, not the courts. There’s no jail time, no criminal fine, and no criminal record.

What it does carry is a one-year license suspension. For a college student who needs to drive to work or an internship, or a young professional just starting their career, that suspension can be devastating in its own right.

Tier 2: VC 23140 (BAC of 0.05% or Greater)

When an underage driver’s BAC reaches 0.05%, the situation crosses into criminal territory.² VC 23140 is a criminal infraction. While it still doesn’t carry jail time, it does result in a $100 fine, a one-year license suspension, and a mandatory alcohol education program. And unlike VC 23136, this goes on your criminal record as an infraction.

Tier 3: VC 23152 (BAC of 0.08% or Greater, or Impairment)

At 0.08% BAC, or if the driver is actually impaired regardless of BAC, standard adult DUI laws apply in full.³ That means up to six months in county jail, fines that can exceed $2,600 with penalty assessments, a criminal misdemeanor conviction, probation, and mandatory DUI school. This is a full-blown criminal DUI with all the consequences that come with it — the same charges outlined on our first-time DUI page.

Why does this matter for your defense? Because many underage drivers are cited under VC 23136 when their BAC is barely above 0.01%. At that threshold, the margin of error on a handheld PAS device can be the entire difference between a positive and negative result. That’s a defense opportunity that doesn’t exist at higher BAC levels.

What Is VC 23136 Under California Law?

Vehicle Code Section 23136 states: “It is unlawful for a person under the age of 21 years who has a blood-alcohol concentration of 0.01 percent or greater, as measured by a preliminary alcohol screening test or other chemical test, to drive a vehicle.”⁴

Now let’s break down what that actually means in plain English.

“Zero tolerance” is not just a slogan. A BAC of 0.01% is extraordinarily low. For context, a single sip of cough syrup, a bite of food cooked with wine, or even certain mouthwashes can produce a reading at or above 0.01% on a handheld breath testing device. The law is designed to be absolute: if you are under 21 and you have virtually any measurable alcohol in your system, you are in violation.

“As measured by a preliminary alcohol screening test” is where things get interesting from a defense perspective. The PAS test is a handheld, roadside breathalyzer. It is not the same instrument used at the police station for evidential testing. PAS devices are widely recognized as less accurate, less reliable, and more susceptible to environmental contamination than evidential breath testing instruments like the Dräger or Intoxilyzer. At a threshold of 0.01%, that accuracy gap matters enormously.

“To drive a vehicle” requires actual volitional movement of the vehicle. Simply sitting in a parked car with the engine running does not satisfy this element under California law. The prosecution (or in this case, the DMV) must establish that you were actually driving.

What Must Be Proven at the DMV Hearing?

Because VC 23136 is an administrative action rather than a criminal prosecution, there is no jury trial and no CALCRIM jury instruction. Instead, the DMV hearing officer must establish the following by a preponderance of the evidence:

1. You were under the age of 21 at the time of the incident.
2. You were driving a vehicle. This requires evidence of actual volitional movement, not merely being seated in or near a vehicle.
3. You had a blood-alcohol concentration of 0.01% or greater as measured by a PAS test or other chemical test.

“Preponderance of the evidence” means “more likely than not.” That’s a significantly lower standard than the “beyond a reasonable doubt” standard used in criminal cases. But it’s still a standard, and the DMV still has to meet it. If we can cast sufficient doubt on any one of these elements, the suspension should not be imposed.

Every element is a question mark for the DMV, and an opportunity for the defense.

The PAS Test: What Minors Need to Know

This is where California’s underage DUI law diverges sharply from the rules that apply to adults, and it catches a lot of people off guard.

Minors Cannot Refuse the PAS Test

For adults pulled over on suspicion of DUI, the roadside PAS test is generally optional. You can decline it without automatic penalty during the investigation phase of a DUI stop. The mandatory chemical test obligation for adults kicks in after a lawful arrest.⁵

For drivers under 21, the rules are different. Under Vehicle Code Section 13388, any person under 21 who is lawfully detained on suspicion of driving with alcohol in their system is deemed to have given consent to a PAS test.⁶ Refusing the PAS test triggers its own one-year license suspension, completely separate from and in addition to any suspension for a positive result.

What does that mean in practice? If you’re under 21 and an officer asks you to blow into a handheld device at the roadside, you face a suspension either way if you’ve consumed any alcohol. Refusing doesn’t protect you. It guarantees the suspension.

Why PAS Test Accuracy Matters at 0.01%

The PAS device is a handheld, portable breath testing instrument. It is not the precision evidential instrument used at the police station. PAS devices are known to have wider margins of error, and they are more susceptible to interference from mouth alcohol, environmental contaminants, and improper administration.

At a BAC threshold of 0.08% (the standard adult DUI level), a small margin of error might not change the outcome. At 0.01%, that same margin of error can be the entire case. A reading of 0.01% on a PAS device with a known error margin of ±0.01% is, scientifically speaking, indistinguishable from 0.00%.

This is one of the strongest defense angles in underage DUI cases, and one that many attorneys overlook.

The DMV Hearing: Your 10-Day Deadline

Because VC 23136 is handled administratively, the DMV hearing is your primary legal proceeding. Understanding the timeline is critical.

What Happens After the Citation

Here’s the sequence of events, step by step:

Day 1 (citation): The officer confiscates your physical license and issues a temporary license (the pink sheet) that is valid for 30 days. The officer also issues an order of suspension.

Days 1-10 (critical window): You or your attorney must contact the DMV Driver Safety Office and request an administrative per se (APS) hearing. This is not optional. If you do not request a hearing within 10 days, the suspension goes into effect automatically on day 31.

Hearing requested: If you request the hearing within 10 days, your temporary license is typically extended until the hearing takes place and a decision is rendered. This alone can buy weeks or months of driving privileges.

The hearing: The APS hearing is conducted by a DMV hearing officer (not a judge) and can take place in person or by telephone at the San Diego DMV Driver Safety Office. Your attorney can represent you and cross-examine the officer, challenge the PAS test results, and present evidence on your behalf.

Decision: The hearing officer issues a written decision. If the suspension is upheld, you can request a departmental review or file a writ of mandamus in superior court.

Why the 10-Day Deadline Cannot Be Missed

We cannot stress this enough. Missing the 10-day window means the suspension takes effect automatically. No hearing. No opportunity to challenge the evidence. No chance to cross-examine the officer or question the PAS device’s accuracy. The suspension simply happens.

Every day you wait is a day closer to losing that opportunity permanently.

Penalties and Consequences

VC 23136 (Zero Tolerance, BAC 0.01%+)

The direct penalty for a standalone VC 23136 violation is a one-year license suspension.⁷ There is no jail time, no criminal fine, and no criminal conviction. For a first offense with no prior DUI-related contacts, the consequence is limited to the administrative suspension.

If you refuse the PAS test, the suspension is also one year for a first refusal, with longer suspension periods for repeat refusals or prior DUI-related offenses.⁸

VC 23140 (Underage DUI, BAC 0.05%+)

Consequence	Detail
Classification	Criminal infraction
Jail	None
Fine	$100
License Suspension	1 year
Alcohol Education	Mandatory program (typically 3 months for ages 18-20)
Criminal Record	Infraction

VC 23152 (Standard DUI, BAC 0.08%+ or Impairment)

Consequence	Detail
Classification	Misdemeanor (first offense)
Jail	Up to 6 months county jail
Fine	$390-$1,000 + penalty assessments (total often $1,800-$2,600+)
License Suspension	6 months (DMV) + court-ordered restrictions
Probation	3-5 years informal probation
DUI School	3-month or 9-month alcohol education program
Criminal Record	Misdemeanor conviction

The Cascading Effects of a One-Year Suspension

Some people hear “it’s not criminal” and assume VC 23136 isn’t worth fighting. That’s a mistake. A one-year license suspension for a young person in San Diego creates a cascade of real-world problems:

Insurance: Your auto insurance rates will increase dramatically, often for years. You may be required to carry SR-22 insurance, which is significantly more expensive.

Employment: Many jobs require a valid driver’s license, particularly in a spread-out city like San Diego where public transportation doesn’t reach everywhere. Losing your license can mean losing your job or your ability to accept one.

Education: If you commute to SDSU, UCSD, USD, or any other campus, getting to class becomes a daily logistical challenge without a license.

Independence: For young adults building their lives, a one-year suspension affects everything from grocery shopping to medical appointments to social connections.

The bottom line is this: even though VC 23136 isn’t criminal, the practical consequences are serious enough to justify a vigorous defense.

Defense Strategies for Underage DUI in San Diego

The fact that VC 23136 operates at a BAC threshold of 0.01% actually creates defense opportunities that don’t exist in standard DUI cases. The lower the threshold, the more vulnerable the evidence is to challenge. Let’s walk through the approaches we consider.

Challenging PAS Test Accuracy and Reliability

This is often the strongest defense in a VC 23136 case. At 0.01% BAC, the PAS device’s margin of error becomes the central issue.

Calibration records: Every PAS device must be regularly calibrated and maintained. We subpoena the device’s calibration records and maintenance logs. If the device was overdue for calibration or had documented accuracy issues, the reading is unreliable.

Mouth alcohol contamination: This is a major factor at the 0.01% level. Recent use of mouthwash, cough syrup, breath spray, or even certain foods can produce a false positive. Burping, belching, or gastroesophageal reflux (GERD) can cause residual mouth alcohol to inflate readings. At 0.08%, these factors might add a few thousandths of a percent. At 0.01%, they can be the entire reading.

Two-test protocol: Proper PAS administration typically requires two breath samples that agree within 0.02% of each other. If only one sample was taken, or the two samples diverged significantly, the result is questionable.

We can, and will, challenge PAS test results if the facts support a position to do so.

Challenging the Lawfulness of the Stop

The officer must have had reasonable suspicion to initiate the traffic stop and reasonable cause to believe you were under 21 and had consumed alcohol before requesting the PAS test. If the stop was unlawful (no traffic violation, no articulable suspicion of impaired driving), the PAS test result that followed may be suppressed at the DMV hearing.

What did the officer actually observe? A minor traffic infraction like a wide turn or touching a lane line does not automatically justify a DUI investigation. We examine the officer’s stated reasons for the stop and for escalating to a PAS test request.

Rising Blood Alcohol Defense

Alcohol takes time to absorb into the bloodstream. If you consumed alcohol shortly before driving, your BAC at the time of the PAS test may have been higher than your BAC while you were actually behind the wheel. At the 0.01% threshold, even a small difference in timing can mean the difference between a violation and no violation.

Medical Conditions Producing False Readings

Certain medical conditions can produce false BAC readings on breath testing devices:

GERD and acid reflux cause stomach contents (which may contain alcohol vapor) to rise into the esophagus and mouth, inflating breath test readings.

Diabetes and ketoacidosis produce acetone on the breath that some PAS devices misidentify as ethanol.

Hypoglycemia can produce symptoms that mimic intoxication and may affect breath chemistry.

At 0.01%, these conditions don’t just contribute to an inflated reading. They can create the entire reading from nothing.

The “No Driving” Defense

VC 23136 requires that you were actually driving the vehicle. If you were found sitting in a parked car, sleeping in the driver’s seat, or standing near your vehicle, the DMV has not established the driving element. California law generally requires volitional movement of the vehicle, not merely physical proximity to or control of one.

Procedural Defenses at the DMV Hearing

The administrative process itself must be conducted properly:

The suspension notice must have been correctly served. The officer’s sworn statement (DS-367 form) must be complete and accurate. The officer must have been properly trained on the PAS device. The hearing must comply with DMV procedural requirements.

We scrutinize every procedural step because a failure at any point can undermine the suspension.

College Students and Underage DUI in San Diego

San Diego is a college town. SDSU, UCSD, USD, Point Loma Nazarene, and numerous other institutions mean thousands of students between 18 and 20 are navigating social situations where alcohol is present. This demographic is disproportionately affected by California’s zero tolerance law.

Beyond the license suspension itself, college students face additional consequences that many attorneys fail to address:

University disciplinary action: Many universities have codes of conduct that require students to report criminal citations or alcohol-related violations. A VC 23136 citation, even though it’s not criminal, may trigger a disciplinary review depending on your school’s policies.

Financial aid: Certain alcohol or drug-related offenses can affect eligibility for federal financial aid. While a standalone VC 23136 administrative action generally does not trigger federal aid consequences, an escalated charge under VC 23140 or VC 23152 might.

Graduate school and professional licensing: Applications for law school, medical school, and other professional programs routinely ask about alcohol-related incidents. Having a clear answer, or better yet, a resolved and dismissed matter, makes a significant difference.

Military Service Members Under 21

San Diego is home to Camp Pendleton, MCAS Miramar, Naval Base San Diego, and other military installations. Young service members under 21 face a unique problem when cited for underage DUI: they may be subject to both civilian consequences and military justice under the Uniform Code of Military Justice (UCMJ).

A VC 23136 citation can trigger command notification, non-judicial punishment (Article 15/Captain’s Mast), security clearance review, and potential impact on military career advancement. For service members, the stakes extend well beyond a license suspension.

If you’re an active-duty service member facing an underage DUI citation, it’s essential to work with an attorney who understands both the civilian DMV process and the military implications.

Related Charges: Understanding the Differences

Underage DUI cases frequently involve related or co-charged offenses. Understanding how these charges interact helps you see the full picture of what you’re facing.

Possession of alcohol in a vehicle by a minor (VC 23224): If alcohol was found in your vehicle, this misdemeanor charge may be added. It carries up to six months in jail, up to $1,000 in fines, and vehicle impoundment or license suspension.⁹

Minor in possession of alcohol (BP 25662): A general MIP charge that often accompanies an underage DUI citation, particularly when the driver is also found to be in possession of alcohol outside the vehicle context.¹⁰

Open container (VC 23222): If an open container of alcohol was found in the vehicle, this charge may be added to the citation.¹¹

DUI causing injury (VC 23153): If an accident with injuries occurred, the situation escalates dramatically. DUI causing injury can be charged as a felony and is a potential strike offense.¹²

Reckless driving (VC 23103): Sometimes charged alongside DUI, and also a potential plea reduction from a VC 23152 charge. A “wet reckless” plea (VC 23103/23103.5) still counts as a prior DUI for enhancement purposes, while a “dry reckless” does not.¹³

When Administrative and Criminal Proceedings Run Simultaneously

If your BAC was 0.05% or above, you may face both a DMV administrative proceeding and a criminal case in court. These are separate, parallel tracks with different standards of proof, different decision-makers, and different consequences. Winning at the DMV hearing does not guarantee a favorable outcome in criminal court, and vice versa. An experienced attorney manages both proceedings strategically. Drivers charged under VC 23152 may also face escalating consequences if they have prior offenses — the penalties increase significantly for a second DUI or third DUI within ten years.

Facing Underage DUI Charges in San Diego?

When the stakes involve a young person’s license, education, career trajectory, and potentially their criminal record, you need attorneys who understand the science behind PAS testing, the procedural requirements of DMV hearings, and the full range of consequences that flow from an underage DUI citation. We’ve defended students, service members, and young professionals throughout San Diego County facing exactly this situation. We know how to challenge PAS test results at the 0.01% threshold, and we know how to win DMV hearings.

The 10-day DMV hearing deadline is not flexible. Every day without representation is a day closer to an automatic suspension.

Call us 24/7 for a consultation. We’ll review the facts of your case, explain which statute applies to your situation, and start building your defense before the deadline passes. Contact our team today — your son’s or daughter’s future, or your own, should not be determined by a handheld device with a known margin of error. You must know your rights.

References

1. 1. Vehicle Code, § 23136, subd. (a) [“It is unlawful for a person under the age of 21 years who has a blood-alcohol concentration of 0.01 percent or greater, as measured by a preliminary alcohol screening test or other chemical test, to drive a vehicle.”]↑ Vehicle Code, § 23136, subd. (a) [“It is unlawful for a person under the age of 21 years who has a blood-alcohol concentration of 0.01 percent or greater, as measured by a preliminary alcohol screening test or other chemical test, to drive a vehicle.”]
2. 2. Vehicle Code, § 23140 [Underage DUI with BAC of 0.05% or greater].↑ Vehicle Code, § 23140 [Underage DUI with BAC of 0.05% or greater].
3. 3. Vehicle Code, § 23152, subd. (a) [“It is unlawful for a person who is under the influence of any alcoholic beverage to drive a vehicle.”]; Vehicle Code, § 23152, subd. (b) [“It is unlawful for a person who has 0.08 percent or more, by weight, of alcohol in his or her blood to drive a vehicle.”]↑ Vehicle Code, § 23152, subd. (a) [“It is unlawful for a person who is under the influence of any alcoholic beverage to drive a vehicle.”]; Vehicle Code, § 23152, subd. (b) [“It is unlawful for a person who has 0.08 percent or more, by weight, of alcohol in his or her blood to drive a vehicle.”]
4. 4. Vehicle Code, § 23136, subd. (a) [“It is unlawful for a person under the age of 21 years who has a blood-alcohol concentration of 0.01 percent or greater, as measured by a preliminary alcohol screening test or other chemical test, to drive a vehicle.”]↑ Vehicle Code, § 23136, subd. (a) [“It is unlawful for a person under the age of 21 years who has a blood-alcohol concentration of 0.01 percent or greater, as measured by a preliminary alcohol screening test or other chemical test, to drive a vehicle.”]
5. 5. Vehicle Code, § 23612 [Implied consent; chemical testing].↑ Vehicle Code, § 23612 [Implied consent; chemical testing].
6. 6. Vehicle Code, § 13388 [Implied consent for persons under 21; preliminary alcohol screening test].↑ Vehicle Code, § 13388 [Implied consent for persons under 21; preliminary alcohol screening test].
7. 7. Vehicle Code, § 23136, subd. (a) [“It is unlawful for a person under the age of 21 years who has a blood-alcohol concentration of 0.01 percent or greater, as measured by a preliminary alcohol screening test or other chemical test, to drive a vehicle.”]↑ Vehicle Code, § 23136, subd. (a) [“It is unlawful for a person under the age of 21 years who has a blood-alcohol concentration of 0.01 percent or greater, as measured by a preliminary alcohol screening test or other chemical test, to drive a vehicle.”]
8. 8. Vehicle Code, § 13388 [Implied consent for persons under 21; preliminary alcohol screening test].↑ Vehicle Code, § 13388 [Implied consent for persons under 21; preliminary alcohol screening test].
9. 9. Vehicle Code, § 23224 [Possession of alcoholic beverage in motor vehicle by person under 21].↑ Vehicle Code, § 23224 [Possession of alcoholic beverage in motor vehicle by person under 21].
10. 10. Business & Professions Code, § 25662 [Minor in possession of alcoholic beverage].↑ Business & Professions Code, § 25662 [Minor in possession of alcoholic beverage].
11. 11. Vehicle Code, § 23222 [Possession of open container in motor vehicle].↑ Vehicle Code, § 23222 [Possession of open container in motor vehicle].
12. 12. Vehicle Code, § 23153 [DUI causing bodily injury].↑ Vehicle Code, § 23153 [DUI causing bodily injury].
13. 13. Vehicle Code, § 23103; Vehicle Code, § 23103.5 [Reckless driving; plea bargaining in alcohol-related cases].↑ Vehicle Code, § 23103; Vehicle Code, § 23103.5 [Reckless driving; plea bargaining in alcohol-related cases].