What Happens if I Refuse a DUI Test?

If you are stopped by law enforcement on suspicion of driving under the influence (DUI) in California, you may be asked to perform different types of tests. Many drivers don’t realize that not all tests are the same, and refusing some can bring very different legal consequences than refusing others. Understanding what you’re required to do under California’s implied consent law, and what can happen if you refuse, is critical if you find yourself pulled over for a suspected DUI. Learn more below, and if you have been arrested for drinking and driving in Ventura County, contact the Law Office of Paul Tyler for immediate assistance from a skilled and experienced Oxnard DUI defense lawyer.

California’s Implied Consent Law Explained

Under California Vehicle Code Section 23612, every person who drives a motor vehicle in California is deemed to have given their consent to a chemical test of their blood or breath if they are lawfully arrested for DUI. This is known as “implied consent.” Essentially, by holding a driver’s license and operating a vehicle on California roads, you have already agreed in advance to submit to a chemical test after an arrest.

It’s important to understand that this implied consent applies only after you have been arrested for DUI, not before. Many people confuse this with roadside tests that officers ask you to perform before deciding whether to arrest you.

Field Sobriety Tests vs. Preliminary Alcohol Screening vs. Chemical Tests

Not all DUI tests are created equal, and they do not carry the same legal requirements or consequences if you refuse.

Field Sobriety Tests (FSTs)

These are the coordination and balance tests you often see on TV, like walking a straight line, standing on one leg, or following a penlight with your eyes. Under California law, you are not legally required to take these tests. They are entirely voluntary. Officers use them to build probable cause for an arrest, but they are subjective and can be influenced by nerves, fatigue, or medical conditions. Politely declining to perform these tests is within your rights and does not result in any automatic penalty.

Preliminary Alcohol Screening (PAS) Test

This is a handheld breath test usually administered at the roadside before an arrest. For drivers age 21 and older who are not on DUI probation, the PAS test is also voluntary, and you can legally decline it without penalty. However, if you are under 21 or on DUI probation, you must submit to the PAS test if requested by law enforcement, and refusal can result in license suspension and other consequences.

Post-Arrest Chemical Test

Once you have been lawfully arrested for DUI, the implied consent law kicks in. You are now legally required to submit to a chemical test, usually in the form of a breath or blood test. In rare cases, a urine test may be offered if breath or blood tests are unavailable or medically inadvisable.

What Happens If You Refuse the Post-Arrest Chemical Test?

Refusing a chemical test after arrest is not the same as declining a field sobriety or PAS test. If you refuse a required chemical test, the consequences are automatic and serious, whether or not you are eventually convicted of DUI.

First, the DMV will impose an automatic driver’s license suspension. Under California Vehicle Code Section 13353, a first refusal results in a one-year license suspension. A second refusal within 10 years carries a two-year revocation, and a third refusal bumps it to three years.

Second, your refusal can be used against you in court. Prosecutors can argue that your refusal shows consciousness of guilt, i.e., that you refused because you knew you were intoxicated. This can be powerful evidence for the prosecution at trial, and you don’t have a low test result to rebut their assertion that you were driving under the influence.

Third, a refusal can lead to enhanced criminal penalties. For example, if you are convicted of DUI, the refusal can result in mandatory jail time and longer DUI education programs.

How Refusing Compares to “Failing” a Test

Some drivers mistakenly believe that refusing the test is safer than providing evidence of intoxication. In reality, refusal often creates more problems than it solves.

If you “fail” a chemical test — meaning your blood alcohol concentration (BAC) is 0.08% or higher — the prosecution will have direct evidence of your intoxication. This can certainly strengthen their case, but experienced DUI defense lawyers know how to challenge the test’s accuracy, the legality of the stop, and whether the officer followed proper procedures.

When you refuse the test, you eliminate that direct evidence, but you give the prosecutor another weapon: the refusal itself. In addition to the automatic license suspension and the enhanced penalties, the refusal can sway jurors to assume you had something to hide.

In many cases, the penalties for refusing are harsher than those for failing. You may still face a DUI charge, but you will also face mandatory license suspension with no restricted license for work or school, something that is sometimes available if you fail the test but don’t refuse.

Protect Your Rights — Know Where You Stand

If you are stopped for DUI in Oxnard or anywhere in Ventura County, remember:

• You can politely refuse field sobriety tests if you choose.
• If you are over 21 and not on probation, you can refuse the PAS test.
• If you are lawfully arrested for DUI, you are required by law to take a chemical test.

Above all, if you’re arrested for DUI, whether you refused the test or not, speak with an experienced criminal defense attorney as soon as possible. Your freedom, license, and future may depend on it.

Call the Law Office of Paul Tyler in Oxnard Today

California criminal defense attorney Paul Tyler has extensive experience defending people accused of DUI and other criminal charges in Oxnard and throughout Ventura County. He will help you understand your rights, challenge the evidence against you, and fight for the best possible outcome.

If you have questions about a DUI stop, chemical test, or refusal consequences, contact our office today for immediate help or to schedule a no-cost, confidential consultation.