The dreaded check engine light. It always seems to appear at the worst time—and it’s never clear what it means without a diagnostic test. It could be a loose gas cap... or it could be a failing catalytic converter or engine misfire.
So what do you do when your check engine light is on? Should you fix it—or is it better to sell the car as-is and move on?
Let’s break down what that light really means, what it might cost to fix, and when it’s smarter to skip repairs altogether and sell your car with the check engine light on.
What Does the Check Engine Light Actually Mean?
The check engine light is part of your car’s onboard diagnostics system (OBD-II). When it turns on, it’s telling you something in the engine, emissions, or powertrain system isn’t working correctly.
Common causes include:
- Faulty oxygen sensor
- Worn spark plugs
- Loose or damaged gas cap
- Failing catalytic converter
- Vacuum or exhaust leaks
- Transmission issues
Some of these are simple to fix. Others can cost thousands.
How Much Does It Cost to Fix a Check Engine Light?
Here’s what you might expect depending on the problem:
Problem |
Average Repair Cost |
Gas cap replacement |
$25 - $100 |
Spark plugs or wires |
$100 - $400 |
Oxygen sensor |
$150 - $500 |
Catalytic converter |
$900 - $2,500+ |
Transmission-related issues |
$1,200 - $4,000+ |
As you can see, there’s a huge range—so it’s not always worth rolling the dice.
How the Check Engine Light Affects Car Value
If you're trying to sell or trade in your vehicle, that glowing light on the dash sends a clear message: there could be expensive problems hiding under the hood.
Dealerships and private buyers may:
- Offer significantly less for the car
- Request you fix the issue first
- Avoid the sale altogether
That’s why many sellers choose to work with a buyer who specializes in vehicles with mechanical issues—like DamagedCars.com.
Should I Fix the Problem or Sell the Car As-Is?
If you know the issue is minor—and you’re confident in the repair shop—fixing it might help you boost the sale value.
But if the light signals a more serious (or costly) issue and your car already has:
- High mileage
- Age-related wear and tear
- Other mechanical or cosmetic problems
...then the smarter choice might be to sell it as-is.
Yes, You Can Sell a Car With the Check Engine Light On
While some buyers won’t touch a car with warning lights, DamagedCars.com will.
We specialize in buying vehicles with engine trouble, emission problems, and diagnostics issues. Our offers are based on your car’s condition, not just what’s wrong with it.
Why Sell to DamagedCars.com?
- Get a guaranteed quote in under 2 minutes
- No inspections or repair costs required
- We tow the car for free from your location
- Get paid fast when we pick it up
You won’t need to fix a thing, and there’s zero pressure to sell unless you’re ready.
How It Works
- Tell us about your car. Fill out our short online form.
- Get an offer. We’ll send a fair market value quote.
- Schedule a pickup. We come to you.
- Get paid. No fees, no delay.
Final Thoughts
If your check engine light is on and you’re staring down a costly repair—or just don’t want to deal with the uncertainty—it might be time to sell.
DamagedCars.com helps drivers like you turn problematic vehicles into quick cash. No more second-guessing diagnostics or repair bills. Just a fast, fair way to move on.
Get your offer today and let us help you skip the check engine stress.
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