How Long Before Check Engine Light Comes Back On After Reset

When your check engine light illuminates, it can be unsettling. You may not be aware of the nature or severity of the issue. Errors will be removed from the computer if you clear the error codes, but you will also lose information that could help you address the problem. What should you do then?

In this post, we will discuss what to do when your check engine light illuminates and how to decipher the stored computer codes. We will also discuss how to diagnose the issue so that you can get your vehicle back on the road as quickly as possible.


Can Clearing Codes Fix The Problem

If your car is having issues and you’re wondering if clearing the codes will fix the problem, the answer is maybe. Clearing the codes will delete the errors from the computer, but you’ll also lose the information that could help you solve the problem.

How Long Before Check Engine Light Comes Back On After Reset

So, unless the issue has been corrected, it’s probably not worth erasing the codes. Additionally, clearing codes to pass a smog test generally won’t work.

How Long Before Check Engine Light Comes Back On After Reset

If the check engine light was reset without repairs, what set the code? It could turn on immediately or when the programming says to. After resetting a check engine light, all readiness counters reset after 60–70 miles.

Check engine light resets the computer. This erases all computer memory codes. This doesn’t mean the problem that triggered the check engine light is fixed. The check engine light will likely return if the problem isn’t rectified.

There are a few things that can reset the check engine light. The problem that triggered the check engine light may not be rectified. Incomplete repairs are a common reason the check engine light returns. A new problem could be triggering the check engine light.

If the check engine light returns quickly after being reset, the problem may not be fixed. If the check engine light returns after a few days or weeks, there’s a new problem.

How Many Miles Do You Have To Drive After Resetting Your Check Engine Light

Check engine lights can be stressful. The problem isn’t clear, and it might be dangerous. Thankfully, it’s usually minor. Often, the light comes on because of a loose gas cap.

Even if the condition is slight, get it looked out ASAP. Resetting the check engine light is required. You’ll need to drive 50 to 100 miles afterward.

The car’s computer must monitor all the sensors after you reset the check engine light. So, drive normally for 50 to 100 miles. So, the computer can accurately assess if there’s a problem.

If the situation is serious, the light may return rapidly. The light should be off if everything is working properly. If you need to reset your check engine light, drive more miles first.

I’ll Check Engine Light Come Back On After it Cleared

If your vehicle’s check engine light is illuminated, there is a good possibility that there is a problem. It is possible, however, that the warning light is transitory and will disappear after the code is cleared.

In some instances, the light may return after the code has been cleared. If this occurs, it might be prudent to have your car inspected by a mechanic.

What Happens Reset Check Engine Light

When you reset the check engine light, you are essentially forcing the computer’s saved state to be reloaded. This is accomplished by inserting the key into the ignition, turning it on for 1 to 2 seconds, and then off for 1 to 2 seconds. Repetition is required three or four times.

If the check engine light stays after being reset, there may still be a problem with your car. It’s also conceivable that the light wasn’t reset correctly.


In conclusion, if your check engine light illuminates, the best course of action is to have a mechanic do a diagnostic. In this manner, you can quickly determine the source of the problem and correct it. You will lose information that could help you address the problem if you clear the codes, therefore it is preferable to leave them alone. Merci for reading!

Liam Dare

Since I was young, I have always been in love with cars. From the sounds of the engine to the way they move on the road, everything about them fascinates me. I spent much of my childhood playing with toy cars and dreaming of driving my own car someday. When I grew up, I decided to follow my passion and become an auto mechanic. I started out working in auto repair shops and learning everything I could about how engines work and how to repair them. Over the course of more than 20 years of experience, I have worked on all kinds of vehicles, from classics to the most modern ones. But even though I loved my job, I always felt that I wanted to do something more to share my love for cars with the world. And that's how I came up with the idea of, a car blog where I can share my knowledge and passion with other car enthusiasts. On my blog, I like to talk about all kinds of car-related topics, from new model reviews to maintenance tips to make sure your car is always in good shape. I also like to share stories about my own adventures on the road and talk about racing events and car shows I've attended.