--- title: "California Vehicle Code 23152(b) - Driving with BAC 0.08% or Higher: DUI Per Se Law" description: "VC 23152(b) makes driving with a BAC of 0.08%+ illegal in California, regardless of impairment. Learn penalties, DMV rules, and defenses to challenge test results." url: "https://www.thehfirm.com/penal-codes/vehicle-code-23152-b-driving-with-bac-0-08-percent-or-higher" site: "H Law Group" --- # California Vehicle Code 23152(b) - Driving with BAC 0.08% or Higher: DUI Per Se Law VC 23152(b) makes driving with a BAC of 0.08%+ illegal in California, regardless of impairment. Learn penalties, DMV rules, and defenses to challenge test results. Topics: DUI, Vehicle Code, BAC, Breath Test, Criminal Defense, Los Angeles California [Vehicle Code 23152(b)](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=23152.&lawCode=VEH) makes it a crime to drive with a blood alcohol concentration (BAC) of 0.08% or higher. This is called "DUI per se" - the number alone makes you guilty, even if you show no signs of impairment. If your BAC is 0.08% or above, you can be convicted regardless of how well you were driving. This objective standard differs from [VC 23152(a), which focuses on whether alcohol actually impaired your driving ability](/penal-codes/vehicle-code-23152-a-driving-under-the-influence). ## What Does VC 23152(b) Actually Say? The statute reads: "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." Notice what is missing: any mention of impairment. The law cares about the number, not your behavior on the road. You could be driving perfectly, pass all field sobriety tests, and still be guilty if your BAC is 0.08% or higher. ## Elements Prosecutors Must Prove To convict you under VC 23152(b), the prosecution must prove two things beyond a reasonable doubt: 1. You drove a motor vehicle 2. Your BAC was 0.08% or higher at the time you drove The key difference from 23152(a) is the second element. For 23152(a), prosecutors must prove you were impaired by alcohol. For 23152(b), they only need to prove you had a BAC of 0.08% or higher. ## VC 23152(b) vs. VC 23152(a): The Objective vs. Subjective Standard California prosecutors typically charge both 23152(b) and 23152(a) because they address DUI from different angles: - **23152(b) (Objective/Per Se):** "Did your BAC test show 0.08% or higher?" If yes, you are guilty. Your driving skill, your behavior, your tolerance - none of it matters. - **23152(a) (Subjective/Impairment):** "Did alcohol impair your ability to drive safely?" This requires evidence of bad driving, poor field sobriety test performance, or physical signs of intoxication. Charging both gives prosecutors two independent paths to conviction. If your BAC test gets thrown out, they still have 23152(a). If your driving looked perfect, they still have 23152(b). This is why nearly every DUI arrest includes both charges. ## How Prosecutors Prove Your BAC To prove 23152(b), prosecutors rely on chemical test results. They do not need field sobriety tests or officer observations of impairment. - **Preliminary Alcohol Screening (PAS):** The roadside breath test you can refuse if you are 21 or older and not on DUI probation. If you are under 21 or on probation, refusal results in a one-year license suspension. - **Evidentiary Breath Test:** The breathalyzer at the police station or jail. This test is mandatory under California's implied consent law. Refusal triggers a one-year license suspension and enhanced penalties. - **Evidentiary Blood Test:** A blood draw at the station, jail, or hospital. This is considered more accurate than breath testing but also has potential contamination issues. The law creates a rebuttable presumption: if your BAC is 0.08% or higher when tested within 3 hours of driving, the court presumes it was also 0.08% or higher while you were driving. You can challenge this with evidence of "rising blood alcohol." ## Real-Life Example: The Sober Driver with High BAC Jerry gets pulled over for a broken taillight in Los Angeles. He had two drinks at dinner an hour ago. The officer smells alcohol but Jerry shows no signs of impairment: no slurred speech, steady balance, passes all field sobriety tests. Jerry's PAS test shows 0.09% BAC. He is arrested. At the station, the evidentiary breath test confirms 0.09%. Result: Jerry is charged with VC 23152(b) despite driving perfectly and showing no impairment. Under 23152(b), his perfect driving does not matter. The 0.09% BAC is enough. ## Defenses to VC 23152(b) Charges While 23152(b) seems like a simple numbers game, there are multiple ways to challenge a DUI per se charge. The most common defenses target the chemical test results themselves. ### Rising Blood Alcohol Defense Alcohol takes time to absorb into your bloodstream. If you drank shortly before driving, your BAC may have been below 0.08% while you were actually driving but rose above 0.08% by the time you were tested. - **Key fact:** The law cares about your BAC at the time of driving, not at the time of testing. - **How it works:** A forensic toxicologist calculates your likely BAC at the time you were driving based on your drinking timeline, body weight, and metabolism. This defense is strongest when: you had your last drink within an hour of driving, your BAC test was close to 0.08% (like 0.09% or 0.10%), and you provided a clear timeline of your drinking. ### Mouth Alcohol Contamination Breathalyzers measure deep lung air, but residual alcohol in your mouth can contaminate the sample and produce a false high reading. Mouth alcohol comes from: - Regurgitation or burping within 15-20 minutes of the test - Mouthwash, breath spray, or medicine containing alcohol - Dental work, braces, or dentures trapping alcohol - GERD, acid reflux, or hiatal hernia - Diabetes or hypoglycemia Proper breathalyzer protocol requires a 15-20 minute observation period before testing to rule out mouth alcohol contamination. Many officers skip this step. ### Title 17 Violations Title 17 of the California Code of Regulations sets strict rules for breath and blood testing. Violations can get test results excluded from evidence. - **Breath testing issues:** Machine not properly calibrated, operator certification expired, improper maintenance records, no observation period - **Blood testing issues:** Improper chain of custody, blood drawn by unqualified person, preservative or anticoagulant not used, improper storage Your attorney can subpoena maintenance records, calibration logs, and operator certifications. Missing or incorrect paperwork can invalidate the test. ### Illegal Traffic Stop or Arrest Police need "reasonable suspicion" to pull you over and "probable cause" to arrest you for DUI. If either is missing, evidence obtained afterward may be suppressed. - **Reasonable suspicion:** A specific, articulable fact that you violated a traffic law (e.g., swerving, speeding, broken taillight). A hunch is not enough. - **Probable cause for arrest:** Enough evidence to believe you were driving under the influence. Bloodshot eyes and a faint smell of alcohol alone may not be enough. ## Penalties for VC 23152(b) Convictions DUI penalties under 23152(b) are identical to those under 23152(a). California uses a 10-year lookback period to determine if a DUI is a first, second, or third offense. ### First Offense DUI (within 10 years) - 3 to 5 years informal (summary) probation - 48 hours to 6 months county jail (often no jail if probation granted) - $390 to $1,000 in fines plus penalty assessments (total often reaches $2,000+) - 6-month license suspension (can drive immediately with IID installation) - DUI school: 3 months if BAC under 0.15%, 6 months if 0.15-0.19%, 9 months if 0.20%+ ### Second Offense DUI (within 10 years) - 3 to 5 years informal probation - 96 hours to 1 year county jail (minimum 96 hours mandatory) - $390 to $1,000 in fines plus penalty assessments - 2-year license suspension (1 year with IID) - 18 or 30-month DUI school program ### Third Offense DUI (within 10 years) - 3 to 5 years informal probation - 120 days to 1 year county jail (minimum 120 days, or 30 days with 30-month DUI school) - $390 to $1,000 in fines plus penalty assessments - 3-year license revocation (2 years with IID) - 30-month DUI school program - Habitual Traffic Offender (HTO) designation ### Fourth or Subsequent DUI (within 10 years) A fourth DUI within 10 years is a "wobbler" - it can be charged as either a misdemeanor or a felony. - Misdemeanor: Up to 1 year county jail - Felony: 16 months, 2 years, or 3 years state prison Permanent revocation of driving privilege (with possible reinstatement after 5 years) ## License Suspension and the 10-Day DMV Deadline When you blow 0.08% or higher on the evidentiary test, police confiscate your license and give you a pink temporary license. You have exactly **10 days from your arrest** to request a DMV Administrative Per Se (APS) hearing. Miss this deadline and your license suspension begins automatically on day 30. Requesting the hearing extends your temporary license until the hearing. At the hearing, you can challenge whether the officer had cause for the stop, whether your arrest was lawful, and whether the chemical testing followed proper procedures. ## Insurance Consequences A DUI conviction typically doubles or triples your auto insurance premiums for 3-5 years. California requires an SR-22 certificate of financial responsibility for 3 years after license reinstatement. ## Immigration Consequences A simple misdemeanor DUI for alcohol is generally not considered a deportable offense or a crime involving moral turpitude. However, consult an immigration attorney if your case involves drugs, injury, or other aggravating factors. ## Expungement After completing probation, you can petition the court to expunge your DUI conviction under Penal Code 1203.4. This withdraws your guilty plea and dismisses the case. Employers cannot use an expunged conviction to deny you a job. Expungement does not erase the conviction entirely. It still counts as a prior if you get another DUI within 10 years, and it remains visible to licensing boards and law enforcement. ## Plea Bargain Options Prosecutors often agree to reduce DUI charges to lesser offenses, especially for first-time offenders or cases with weak evidence. Common plea bargains include: - [**Wet reckless (VC 23103.5):**](/penal-codes/vc-23103-23103-5-wet-reckless-dui-plea-reduction)[ Lower fines, shorter DUI school (12 hours), no mandatory license suspension, less impact on insurance](/penal-codes/vc-23103-23103-5-wet-reckless-dui-plea-reduction) - **Dry reckless (VC 23103):** No alcohol involvement mentioned, better for immigration and professional licensing - **Exhibition of speed (VC 23109(c)):** Sometimes offered for first offenses with low BAC ## Frequently Asked Questions ### Can I refuse the chemical test? You can refuse the roadside PAS test if you are 21+ and not on DUI probation. You cannot refuse the evidentiary breath or blood test after arrest without consequences: a one-year license suspension (first offense) and enhanced criminal penalties. ### What if I was driving perfectly? Under VC 23152(b), perfect driving does not matter. If your BAC is 0.08% or higher, you are guilty. The law targets the number, not your driving ability. ### How accurate are breathalyzers? Breathalyzers have a margin of error of ±0.01-0.02%. They also cannot distinguish between mouth alcohol and deep lung alcohol. Medical conditions, improper calibration, and operator error can all produce false high readings. ### What is the difference between 0.08% and 0.10% BAC? Any BAC of 0.08% or higher is illegal. A higher BAC (0.15%+) triggers enhanced penalties: longer DUI school (9 months vs. 3 months), longer IID requirements, and may affect plea bargain negotiations. ### Can I still drive after a DUI arrest? You can drive immediately if you install an IID, regardless of your license suspension length. Without an IID, you cannot drive during your suspension period. Requesting a DMV hearing within 10 days extends your temporary license until the hearing. ## Charged with DUI Based on BAC Test Results? A BAC test showing 0.08% or higher is not an automatic conviction. Breath and blood tests can be challenged on multiple grounds: rising BAC, mouth alcohol contamination, Title 17 violations, and improper police procedures. Contact us today for a free consultation to review your test results and discuss your defense options. ## Related California penal codes - [California Vehicle Code 23152(a) - DUI of Alcohol: Laws, Penalties & Defenses](https://www.thehfirm.com/penal-codes/vehicle-code-23152-a-driving-under-the-influence) - [Vehicle Code 23153 VC - DUI Causing Injury](https://www.thehfirm.com/penal-codes/vehicle-code-23153-vc-dui-causing-injury) - [Wet reckless (DUI plea reduction)](https://www.thehfirm.com/penal-codes/vc-23103-23103-5-wet-reckless-dui-plea-reduction) --- ## Contact H Law Group - Phone: (888) 499-4948 (phones answered 24/7) - Email: info@thehlawgroup.com - Free consultation: https://www.thehfirm.com/free-consultation - Contact form: https://www.thehfirm.com/contact-us ### Offices - Los Angeles Branch: 714 W Olympic Blvd Ste, 803, Los Angeles, CA 90015 -- (213) 985-4431 - San Diego Branch: 600 W Broadway, Suite 700, San Diego, CA 92101 -- (619) 716-0968 - San Jose Branch: 333 W San Carlos St, San Jose, CA 95110 -- (408) 869-6572 - Orange County Branch: 2030 Main St, # 1300, Irvine, CA 92614 -- (949) 832-8057 - Riverside County Office: 41593 Winchester Rd, Suite 200, Temecula, CA 92590 -- (951) 418-3576 - Santa Barbara Branch: 1117 State St, Santa Barbara, CA 93101 -- (888) 499-4948 ### Disclaimer This website provides general legal information only and does not create an attorney-client relationship. For legal advice about your specific situation, contact H Law Group directly.