Check Engine Light Went Off After A Week: What Should You Do?

The check engine light typically signals a problem if it comes on. It can indicate a little pain or something more serious.

To prevent future harm, you should generally take your car to a professional to diagnose and fix the potential problem. But before you could fix the problem, the check engine light went out without your intervention. So, is the problem fixed, and can the check engine light turn off?

We’ll address the question of whether a check engine light can turn off on its own in more detail in this article. But also what you ought to do after that. Go on reading!

Can The Check Engine Light Turn Itself off?

When the issue that activated the check engine light has been resolved, the light may turn off. The test light will turn on your dashboard if your automobile fails two consecutive tests that the computer frequently runs to identify problems. As a result, it passed if the check engine light automatically went out.

If the problem that triggered the check engine light is fixed, the light will turn off. The check engine light may have come on if your converter is marginal and you drove in stop-and-go traffic a lot, which puts a lot of strain on the converter.

What Does The Check Engine Light Mean?

One of the most prevalent dashboard lights is the check engine light. The computer in your car continuously checks as part of the On-Board Diagnostic system.

Auto mechanic uses the tablet to check.

It comprises continuous monitoring of things like engine timing and misfires and non-continuous monitoring of other relevant things like the catalytic converter or little vapor leak that could raise emissions.

Mechanics and auto enthusiasts occasionally refer to “two trip monitors” when discussing warning lights when speaking automotive lingo. If your automobile fails two consecutive tests, it will signal a check engine light on your dashboard, often yellow, orange, or amber.

However, there is no way to determine the cause of your engine light being on, so it is best to let a specialist evaluate the problem to find out what is wrong.

Why Did My Check Engine Light Turn Off By Itself?

The check engine light often remains illuminated if the underlying issue persists and your car fails inspections. The light will remain on until the problem is resolved, whether it be a catalytic converter failure, an inaccurate air-fuel ratio, or an EVAP system leak caused by a loose fuel cap that allows fuel vapors to escape.

Many drivers, however, believe that resetting the check engine light is vital, but occasionally you don’t need to do anything.

Imagine that your check engine light starts to illuminate. A week later, you are preparing to take your automobile to the shop, but on the way there, the check engine light goes out on its own. It signifies that your car’s diagnostic system ran three tests during this drive, which were successful.

Great! You turn around and head back home, believing that your issue is resolved, which is possible. But it’s always ideal and advised to have your car diagnosed by a professional. The experts can check the issue codes with an OBD scanner to determine what and why the test failed and what initially caused that light to come on.

Another typical case is that if the check engine light came on after filling up with gas, a loose gas cap was probably to blame. During a drive cycle, the Evaporative Emission Control System (EVAP) in your automobile checks for leaks and monitors the pressure in the fuel tank to alert you if gas fumes are escaping.

A man opens a gas tank in a car for refueling with gasoline.

The check engine light may come on, and your car may even start to smell like gas if there is a pressure leak in the fuel tank. The gas cap includes a gasket that keeps the fuel tank airtight. However, after replacing your gas cap, you most likely tightened it sufficiently to seal it, and the light turned off.

Is It Safe To Drive With Check Engine Light On?

You typically experience a queasy feeling in the pit of your stomach whenever a warning light turns on. But does that imply that driving is unsafe?

It is advised to pull over and call for assistance if the check engine light comes on and you notice any changes in how your car performs. The failure of a non-invasive sensor or a specific mechanical component is more likely to be to blame if the light illuminates, even though nothing appears to be wrong. It indicates that driving can be done without risk of further harm.

However, the light can put your vehicle into a safety mode known as “limp mode,” which can disable less-essential components and limit its speed to prevent you from blowing or damaging any engine components.

In any case, you need to start looking into potential problems or causes right once. In the long run, it rarely pays off to be foolishly frugal and ignore the issue. Additionally, you would only want to travel required in limp mode.

Should I Still Get My Car Checked If The Check Engine Light Is Turned Off?

Even if the light is off, it is advised that you have your car inspected still. It would help if you looked for issue codes since, as was already explained, something caused that light to turn on in the first place.


Any vehicle should have a check engine light. Regular checks are performed in your car to ensure everything is working correctly. If the light illuminates, it indicates a problem that must be fixed because your car failed the test twice in a row.

In that case, may a check engine light turn off by itself? Indeed, it can. The indicator will go out if the diagnostic system for the car completes the same test three times after it previously failed. But you should still check your car’s issue codes with an OBD scanner.

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About Matthew Webb

Hi, I am Matthew! I am a dedicated car nerd! During the day, I am a journalist, at night I enjoy working on my 2 project cars. I have been a car nerd all my life, and am excited to share my knowledge with you!

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