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Quick overview
The short answer
Yes, you can sell a car with the check engine light on. Nothing in Nevada stops you from selling it. What changes is who will want it and what they'll pay.
The one rule that matters comes from the Nevada DMV's emission page: in private transactions, the emissions test is the buyer's responsibility. A dealer is different. Any Nevada used car dealer must provide a valid passing emissions test with any vehicle that will be registered in Clark or Washoe county, so a dealer will price in the cost of getting yours to pass.
If your real question is what happens when a car fails the emissions test, see our guide to selling a car that failed smog. This guide is about the light itself and what to do about it.
What the check engine light actually means
The light means the car's computer has found a fault. It doesn't say how serious it is. The Nevada DMV notes two things worth knowing:
- A loose gas cap is one of the most common causes. If the light comes on suddenly, check the cap first.
- A flashing light is different. The DMV says a flashing check engine light indicates a serious malfunction: pull over and stop driving right away.
A steady light is a warning. A flashing light is an emergency, and a car in that state needs a tow, not a test drive with a buyer.
Step 1: Find out why it's on
Don't guess. The light could be a loose cap or a costly repair, and a buyer will ask. Get the code read. Some parts stores read codes for free, so call ahead to check, and any repair shop can run a full diagnosis. Ask for the code in writing and, if you can, a written estimate for the repair.
Then you have a real number to work with instead of a worry.
Don't clear the code to hide it
It's tempting: clear the code, the light goes out, and the car looks fine. It doesn't work well. The DMV says that after repairs or a battery replacement, a car may show "Rejected" on an emissions test. A "Rejected" test isn't the same as a "Failed" test. It means the car isn't ready to be tested. Cars from 1996 and newer need to be driven under varying conditions for up to a week so the system can finish its checks.
So clearing the code before a sale usually just delays the problem to the buyer's emissions test, and the light can come back. If you're selling, say the light is on.
What to tell the buyer
Tell them. The light is visible on the dashboard, and hiding a known problem can come back on you. A simple approach:
- Say the light is on, and share the code if you have it.
- Share what a shop said it would cost to fix, if you got an estimate.
- Write it into the bill of sale, for example: "Sold as-is, check engine light on, code [code]."
Our guide to the Nevada bill of sale (VP-104) covers what the form needs. A bill of sale supports the sale, but the signed title is what transfers ownership.
Fix it first, or sell as it is?
This is the real decision. Do the math with two numbers:
- The written repair estimate for what's causing the light.
- What the car is worth as it is, from real offers.
If the fix is small, like a gas cap, it can be worth doing, because it removes the buyer's biggest worry. If the fix is large, on an older car it often costs more than it adds. In that case, selling as it is can leave you with more than fixing it would.
If the problem is bigger than a light, see our guides to a car that won't start and a blown engine or bad transmission.
Who buys a car with the check engine light on
- A private buyer. Often pays the most, but takes the longest, and the buyer handles the emissions test.
- A dealer. Faster and simpler, but expect a lower offer, because a Nevada dealer must provide a passing test for cars registered in Clark or Washoe.
- A national online buyer. Quick to get a number. Ask whether your car's condition changes the offer, and compare it with another offer.
- A car buyer like us. We buy cars running or not. The light is one of the things our quote asks about, and the offer is built from your answers.
What cars like yours have sold for in Las Vegas
Before you spend money on repairs, see what real cars are bringing. These are real numbers from our own records, not "up to" prices. They cover older, damaged and non-running cars in the valley right now. We don't track which of them had a check engine light on, so use them as a guide to the range.
30 real offers · Las Vegas valley · Oct 15–28
- 1998 Nissan SentraBoulder City · Oct 28$150
- 2010 Toyota Corolla MatrixOct 27$755
- 2001 Mitsubishi GalantOct 26$60
- 2003 Honda CivicHenderson · Oct 26$470
- 2015 BMW X1Oct 24$1,120
- 2006 Nissan AltimaOct 24$295
- 2003 Volkswagen PassatOct 23$260
- 2006 Toyota AvalonOct 23$575
- 2005 Subaru OutbackNorth Las Vegas · Oct 22$295
- 2013 Dodge JourneyOct 22$345
- 1998 Saturn SC2Oct 21$150
- 2015 BMW 335IOct 21$155
- 2007 Infiniti G35Oct 21$155
- 2014 Jeep Grand CherokeeOct 21$155
- 2014 Jeep Grand Cherokee LimitedOct 21$155
- 2011 Chevrolet CruzeOct 20$370
- 2018 Jeep RenegadeHenderson · Oct 20$1,975
- 2011 Chevrolet Cruze LTOct 20$370
- 2018 Jeep Renegade TrailhawkHenderson · Oct 20$1,975
- 2003 BMW X5Oct 19$225
- 2011 Chevrolet CruzeOct 19$635
- 2003 BMW X5 3.0iOct 19$225
- 2011 Chevrolet Cruze LTOct 19$635
- 2009 Toyota Scion TCOct 18$440
- 2009 Scion tCOct 18$440
- 2013 Dodge AvengerOct 17$295
- 2013 Dodge Avenger SEOct 17$295
- 2002 Mercedes-Benz E-ClassOct 16$155
- 2002 Mercedes-Benz E500Oct 16$155
- 2010 Nissan MaximaOct 15$285
Cars we bought and what the seller was paid at pickup. Swipe through, or tap the dots.
Paid $3,5002015 Lincoln MKCFront-end damage
Paid $3001997 Pontiac Firebird Trans AmFront-end damage
Paid $2,1002010 Audi A5 2.0T PremiumFront-end damage
Paid $360Chevrolet pickup
Paid $1,2002005 Toyota CamryPeeling paint
Paid $7002005 Nissan Maxima SE
Paid $3,2002015 Lincoln MKCFront-end damage
Paid $8002014 Ford Focus SE
Paid $7802005 Toyota Camry
Paid $2,500Toyota Camry
Paid $6002002 Chrysler PT Cruiser TouringFront-end damage
Paid $1,5002011 Dodge Charger R/T
Paid $8002002 Ford Mustang V6
Our junk car price guide has more offers and the scrap-weight math, and what is my junk car worth explains what drives the number.
Selling a car with the light on to us
We buy cars you fully own, running or not. That means the title is in your name, with no loan on it. The check engine light doesn't stop us buying the car, and it's one of the details our quote asks about.
You get a firm offer online in about two minutes and choose a pickup time from the windows offered when you accept. The tow is free, you're paid at pickup, and we handle the title transfer at no cost. Start with our cash for junk cars Las Vegas quote.
After the sale, keep your plates, cancel the registration and file the Vehicle Resale Notification.
Common questions
- Can you sell a car with the check engine light on?
- Yes. A lit check engine light doesn't stop you from selling the car. It does change who will want it and what they'll pay, and in Clark and Washoe counties it affects whether the buyer can register it, because the light can cause an emissions test to fail.
- Can you sell a car in Nevada with the check engine light on?
- Yes. The Nevada DMV says that in a private sale the emissions test is the buyer's responsibility, so a lit light doesn't block you from selling. Tell the buyer about it up front, because they'll need the car to pass before they can register it where testing applies.
- Does a check engine light fail a Nevada smog check?
- It can. The DMV tells owners with the light on to get the car tested anyway, because a failing test is the first step toward a waiver if repairs turn out to be costly. Our guide to selling a car that failed smog covers how waivers work.
- Do I have to tell a buyer the check engine light is on?
- Yes, as a matter of honest dealing. The light is visible on the dashboard, and hiding a known problem can come back on you. Say it's on, share any code you have, and write that the car is sold as-is in the bill of sale.
- Should I fix the check engine light before selling?
- Only if the fix costs less than it adds to the price. Get the code read and a written repair estimate first. If the repair is small, such as a loose gas cap, fix it. If it's large, compare the estimate with what the car is worth as it is.
- Is it worth fixing a check engine light before selling a car?
- Sometimes. A cheap fix can remove the biggest objection a buyer has. An expensive one, like an emissions part, rarely adds back what it costs on an older car. Compare the written estimate with real offers as-is.
- What is the most common cause of a check engine light?
- The Nevada DMV lists a loose gas cap as one of the most common causes. If the light comes on suddenly, check the cap first. Other causes need a code read to identify.
- What does a flashing check engine light mean?
- The DMV says a flashing check engine light indicates a serious malfunction: pull over and stop driving right away. Don't drive a car with a flashing light to a buyer or a shop. Have it towed.
- Can I clear the code and sell the car?
- Clearing the code without a repair is a bad idea. The DMV says that after repairs or a battery replacement the system may show 'Rejected' on a test, which means the car isn't ready, not that it failed. It can take up to a week of varied driving for the system to finish its checks, and the light can come back.
- How much does a check engine light reduce a car's value?
- There's no fixed number. The reduction depends on the cause, the car's age and what a buyer fears it will cost. The reliable way to find out is to compare real offers for the car as it is with the cost of a written repair estimate.
- How much does it cost to fix a check engine light?
- It depends on the code, so get it read first. Some parts stores read codes for free, so call ahead to check. A repair shop can then give you a written estimate for the actual cause.
- Where can I get my check engine light checked?
- Many auto parts stores will read the code for free, and any repair shop can run a full diagnosis. The DMV also tells owners to get an emissions test even with the light on.
- Will CarMax buy a car with the check engine light on?
- It can depend on the car and the appraisal, so ask CarMax directly. A national buyer's online offer is a quick way to see a number, but compare it with other offers.
- Does Carvana take cars with a check engine light?
- Carvana's offer depends on the car's condition, which you describe when you get the quote. Check the offer terms, and compare it with at least one other offer.
- Will a dealer take a car with a check engine light?
- Often yes, but expect a lower offer. The DMV says a Nevada used car dealer must provide a valid passing emissions test with any vehicle going to be registered in Clark or Washoe counties, so a dealer prices in the cost of getting it to pass.
- Who buys cars with a check engine light on?
- Private buyers, dealers, national online buyers and junk car buyers all do. Private buyers may pay the most but take the longest, dealers are faster and pay less, and a car buyer like us buys cars running or not.
- What companies buy cars with a check engine light in Las Vegas?
- We do, if you fully own the car. Our quote asks about the car's condition, and the offer reflects it. Compare it with a dealer's offer and a private sale before you decide.
- Does the check engine light affect your offer?
- It's one of the things our quote asks about, along with whether the car runs and its title status. The offer is built from your answers, so describe the car as it is.
