Marijuana Odor Searches in California: What Police Can Do

The smell of marijuana, by itself, is generally not enough for California police to search your car without a warrant. Cannabis is legal for adults 21 and older, so odor no longer proves a crime on its own. Officers can still search when odor comes with something more: signs of impairment, an open container, an unlawful amount, or other specific facts. Those facts are where most of these cases are won or lost.

This guide explains where the line sits in 2026, what the California Supreme Court recently decided, what to do and say during a stop, and how a search that crosses the line gets challenged in court.

TL;DR

• Adults 21 and older can legally possess up to 28.5 grams of cannabis flower and 8 grams of concentrate, so odor alone does not show a crime.
• Odor plus other facts (impaired driving, an open container, nervousness combined with visible cannabis, an unlawful quantity) can still add up to probable cause.
• You can decline to consent to a search. Saying “I do not consent” calmly is not obstruction, and it protects your ability to challenge the search later.
• An illegal search is challenged with a motion to suppress under Penal Code 1538.5. If the evidence is thrown out, the case can fall apart.
• If you were searched and charged, talk to a criminal defense attorney before you talk to anyone else about what happened.

Table of Contents

• Why the smell of cannabis used to be enough, and why it is not now
• What the California Supreme Court said in Sellers
• When odor still matters
• The consent trap
• Driving, containers and where to keep cannabis
• How a defense lawyer challenges an odor-based search
• Our perspective
• If you were searched and charged
• FAQ
• Sources

Why the smell of cannabis used to be enough, and why it is not now

Before legalization, any cannabis was contraband. An officer who smelled it had a ready-made reason to believe a crime was happening, and courts routinely accepted that. Proposition 64, passed in 2016, changed the starting point. Under California’s current rules, adults 21 and older may possess, transport and use up to 28.5 grams of non-concentrated cannabis and up to 8 grams of concentrated cannabis.

If possession is lawful by default, the smell of cannabis describes something that may be completely legal. Probable cause requires a fair probability that evidence of a crime will be found. Odor alone cannot supply that when the thing you smell is legal for most adults to carry.

California appellate courts have followed that logic. In Blakes v. Superior Court (2021), the court found that the smell of burnt marijuana coming from a car did not support probable cause on either theory the prosecution offered, in part because the detectives could not tell whether the marijuana was freshly burnt. In People v. Johnson (2020), a man parked on the roadside challenged the denial of his motion to suppress after officers approached his car; the case is one of the decisions defense lawyers cite when odor and a legal-cannabis background meet a Fourth Amendment challenge.

What the California Supreme Court said in Sellers

The most important recent ruling is Sellers v. Superior Court (2026). Officers searched a car and found 0.36 grams of loose marijuana on the floor and a firearm. The lower courts upheld the search, reasoning that marijuana not in a sealed container violated the state’s open container rule and that the circumstances supported probable cause anyway.

The California Supreme Court reversed. It held that a violation of Health and Safety Code section 11362.3(a)(4) requires marijuana in a vehicle to be of a usable quantity, in imminently usable condition, and readily accessible to an occupant. The small amount of loose cannabis on the rear floor did not qualify, and the court also held that the circumstances did not provide probable cause for a warrantless search. You can read the key holding on FindLaw’s copy of the opinion.

Two practical lessons follow:

1. Traces of cannabis are not an open container violation. Crumbs, residue and a tiny amount out of reach do not hand an officer a reason to search.
2. Courts look at the whole picture. Officers in Sellers pointed to nervousness, a rolling tray, marijuana on the floor and a denial that there was marijuana in the car. The court still found that insufficient on those facts. A different set of facts could come out differently.

When odor still matters

You will see articles claiming that police can still search on smell alone because smoking in a car is illegal. The accurate version is narrower. Odor is not automatically meaningless. It can be one piece of the totality of the circumstances. What it cannot do, standing alone, is justify a warrantless search of a car for most adults.

Here are the situations where odor typically gets paired with something else.

Note the last row. The legal-possession argument is built on adult use, so the facts about age, quantity and packaging all change the analysis. That is why each case has to be looked at on its own record.

The consent trap

The most common way people lose these cases has nothing to do with the smell. It happens when an officer says something like “I smell marijuana, mind if I take a look?” and the driver says yes.

A search with your consent does not need probable cause. Many people feel they cannot refuse, so they agree, and in doing so they waive the very protection that would have let a lawyer challenge the search. If you consent and officers find something, the argument that the search was unlawful gets much harder.

You are allowed to say no. A calm, polite sentence works: “Officer, I do not consent to a search.” Then stop talking about the contents of the car. Do not argue, do not physically resist, and do not open the trunk or hand over bags. If the officer searches anyway, that is the moment you stay quiet and let the lawyer sort it out later. A search without consent, a warrant or probable cause is exactly the type that can be challenged in court.

Things worth remembering at a stop:

• Keep your hands visible and follow lawful instructions to provide license, registration and insurance.
• You do not have to answer questions about whether you have been smoking or what is in the car.
• Do not lie. A false statement can hurt you and can be used to build probable cause.
• Note the time, location, officer names or badge numbers, and whether a body camera was visible.

We cover the preservation steps in more detail in our guide on what to do after an illegal search in California.

Driving, containers and where to keep cannabis

A surprising number of cases begin with a simple storage mistake. People believe cannabis must be locked in the trunk. The rule is a bit more flexible. Under Vehicle Code 23222(b) and Health and Safety Code 11362.3, cannabis in a vehicle should be in a sealed container or, if opened, not within reach of the driver and passengers. A sealed container does not have to be in the trunk, but the trunk is the safest place, because it removes any argument about accessibility.

Sellers adds another layer. Before that decision, some prosecutors argued that any loose cannabis in the passenger area made the car searchable. The Supreme Court rejected that for the small amount in that case, requiring a usable quantity that is readily accessible. Still, there is no reason to test the line. Keep cannabis sealed, in the original packaging, and away from the passenger compartment.

Impairment is a separate issue

The Department of Cannabis Control states that driving under the influence of cannabis is illegal in California, with the same potential penalties as driving under the influence of alcohol. This matters for odor searches because the legal-possession argument does nothing for a DUI allegation. If an officer sees signs of impairment, the stop turns into a sobriety investigation, and a search may follow on a completely different basis.

If that is where your case went, read our pages on the 10-day window to protect your license after a marijuana DUI, what the police look for at a DUI stop and your rights at a DUI checkpoint. Time limits on license issues are short, so do not wait.

How a defense lawyer challenges an odor-based search

If police searched your car based on odor and found something, your case does not end there. The usual tool is a motion to suppress under Penal Code 1538.5. The question for the judge is whether the officer had a lawful basis for the search at the moment it started. Nothing found afterward can fill in a missing justification.

On these motions, a defense attorney typically does the following:

1. Reconstructs the timeline. Why was the car stopped? How long did the stop last? When did the odor come up, and was it mentioned in the first report or added later?
2. Pins down the officer’s stated reasons. Reports, body camera footage and dispatch audio often show what the officer actually knew, and in what order.
3. Tests the odor claim. Could the officer tell burnt from raw cannabis? Fresh from stale? Source from the driver or from a passenger? Blakes shows courts pay attention to this.
4. Looks for the other facts. Was there erratic driving, an open container, a visible quantity over the limit? If not, the prosecution is left with odor alone.
5. Examines consent. Did the officer ask? Did you agree? Was it really voluntary, or did it follow a demand?
6. Argues the totality of the circumstances. Success often depends on showing how thin the rest of the record is. See our overview of reasonable suspicion and how to spot an illegal stop.

One point worth knowing is that officer training often trails the appellate courts. An officer may sincerely believe that smell is enough because that is how they were taught. Sincerity does not make a search lawful, but it does explain why these searches still happen so often, and why a careful record matters.

Our perspective

We see two kinds of clients in these cases. The first was searched after a smell comment and is sure the whole thing was illegal. The second consented, felt trapped, and is certain it is over. Neither is quite right, and both need a close reading of the facts before anyone decides how to proceed.

Here is how we approach it at Grace Legal Group. Two attorneys work every case, so one lawyer is never carrying the whole file alone. Our team includes former law enforcement professionals, who read an arrest report the way the officer was trained to write it. They know what a stop is supposed to look like, and where reports tend to overstate what an officer could actually perceive. That helps when we review whether an odor claim holds together.

We also believe a case is more than its suppression issues. When the evidence stays in, we prepare a mitigation packet that tells the prosecutor who you are: work, family, community, faith where it matters to you, and what you have done since the arrest. Prosecutors see paperwork all day. A well-built packet changes how they see the person behind the file, and it is part of why we begin early, before positions harden.

Our honest view of odor cases is simple. The law moved in favor of drivers, but it has not made every search illegal. The outcome depends on small facts, and those facts are easiest to protect in the first days after an arrest.

— Jake

If you were searched and charged

Start by writing down everything you remember: where you were, what the officer said, what you said, who else was in the car, and whether anyone recorded. Keep your paperwork, including the citation, property receipt and any impound or tow notice. Do not post about the stop, and do not discuss it with anyone but your attorney.

What the charge is will shape the defense. A search that began with odor often ends with a drug, firearm or DUI allegation. Our pages on California drug possession defenses, drug possession penalties and diversion and possession with intent walk through each path. If the charge is DUI, see what a DUI defense lawyer looks for.

If you or someone in your family is facing charges after a vehicle search, our team can review the stop, the search and the evidence. Learn more about our drug offense defense and DUI defense work, or reach us through Grace Legal Group. Fees are not published, so the first conversation is where you will learn what your case needs.

FAQ

Is the smell of marijuana probable cause to search your car in California?

Not by itself, in most cases. Adults 21 and older can legally possess cannabis, so smell does not show a crime. Odor can still count alongside other facts, such as impairment, an open container within reach or an apparent unlawful amount.

Can police search my car if I say yes?

Yes. Consent removes the need for probable cause, which is why officers often ask. You can decline politely by saying you do not consent. If you already agreed, tell your attorney exactly what was said, because voluntariness can still be argued.

Is it legal to smoke marijuana in your backyard in California?

Generally yes, on private property. Sacramento Bee’s overview of California cannabis rules notes that you may smoke on private property, but not in public places, and landlords can ban it on their premises. A neighbor’s complaint can also raise a nuisance issue.

Does the smell of marijuana help police if I am accused of DUI?

It can contribute to a DUI investigation, but odor does not prove impairment. Officers look for driving behavior, speech, coordination and test results. Because cannabis DUI carries penalties comparable to alcohol DUI, speak with a DUI attorney quickly, especially because license deadlines are short.

What if the officer found something illegal after smelling marijuana?

The evidence may still be challenged. If the search lacked probable cause, consent or a warrant, your lawyer can file a motion to suppress. If the court grants it, the prosecution may lose its key evidence.

Sources

• Sellers v. Superior Court (2026), California Supreme Court, Justia
• Sellers v. The People (2026), FindLaw
• People v. Johnson (2020), California Court of Appeal, Justia
• Blakes v. Superior Court (2021), Cal.App.5th 904
• What’s legal, California Department of Cannabis Control
• Responsible cannabis use, California Department of Cannabis Control
• Health and Safety Code 11362.3
• CA cannabis laws, Sacramento Bee

Recommended

• California’s Knock and Announce Rule: What to Do After Police Enter
• 10 Days to Protect Your License After a Marijuana DUI in California
• How Two Lawyers Spot Illegal Stops: Reasonable Suspicion in California
• Act Within 48 Hours if Probable Cause Is Missing in California