How To Reset Check Engine Light Without Disconnecting Battery?

If your car’s check engine light has come on, it’s critical that you figure out what’s causing it. Those that disregard the check engine light are setting themselves up for problems, therefore it’s not something that should be put off. There are several ways of how to reset check engine light without disconnecting battery? If you know the light is on in error. There’s no point in doing more work than you have to, and it’s critical that you understand your alternatives in this regard.

Car Code Reader vs. Code Scanner

How To Reset Check Engine Light Without Disconnecting Battery?

As you may have noticed, I’ve used the terms code scanner and auto code reader interchangeably. However, these two gadgets are not interchangeable. They both have a rudimentary code reading function and a resetting or clearing action, but that’s where the similarities end.

Best Code Reader: Get a Price

You can use OBD2 fault reader to check about the issue anywhere on your phone. here is the best OBD2 reader.

A code scan tool has more complex capabilities such as cutting-edge data reading and playback, diagnostic procedures, a larger database, and, in certain cases, a built-in testing tool. In addition, it is more costly than a code reader.

A code reader will suffice if all you want to do is read the codes, clear them, and reset the Check Engine light. It’s not only simple to use, but it’s also effective.

Common Problems Indicated By a Lit Check Engine

If the Check Engine light begins to flicker, it might indicate a more serious problem, such as an engine misfire, which can quickly overheat the catalytic converter and cause a fire. These emission control systems minimize emissions by working at high temperatures, but if they fail, they can cause a fire. This is a light that should not be overlooked. Bring the vehicle to an auto repair shop as soon as possible to get the problem fixed.

If the light is steady, the problem may not be too serious or an emergency. It could be only because of a loose gas cap. A loosened gas cap transmits an error message to the computer which is interpreted as a seepage in the vapor recovery system. A component of the emission control system.

If it is only a loose gas cap, all you need to do is tighten the cap. The light won’t go off immediately, but eventually, it will. However, it is a wise and sensible decision to have your car checked.

It might be an indication that the engine is consuming a lot of fuel or emitting a lot of pollutants. Both of these scenarios are bad for a car’s gas mileage and its chances of passing an emission check.

The Check Engine light comes on for no obvious cause or even when your automobile is in perfect working order. A change in humidity, for example, might cause the condition to be transient. If this is the case, the light will turn off on its own within a short period of time.

If there is nothing wrong with your car engine and check the engine light on, what should I do?. As stated above the non-serious reason for the engine light on, wait for a while it will go off automatically.

Here’s another topic that goes into great depth on the causes of the Check Engine Light.

However in case the check engine light remains on in your dashboard and bothers you, you can reset it without using a scan tool or disconnecting the battery.

Here is how?


Turning your car on and off three times can reset your check engine light without removing the battery. Although this procedure has a high success rate, it does not work for everyone. It all depends on the type of vehicle you have, but it’s still something worth doing. Put the key in the ignition, turn it on for a second, and then turn it off for another second or two. Continue repeating this until you’ve completed three rounds in a row. When you start your automobile for the fourth time, you should see that the check engine light is no longer on.

2nd method for mild engine problems can go off by using a scan tool or code reader after evaluating that the issue can be fixed after resetting.

So How To Reset Check Engine Light Without Disconnecting Battery?

This method will apply only to car models manufactured starting in 1996.

When you see that irritating red or orange light comes on, here’s what you should do:

Step 1

Connect the code scanner or auto code reader to your car’s OBD-II (on-board diagnostic) port, which is situated beneath the steering column. Switch on the engine and turn off all electrical devices..

Step 2 

To view the engine’s fault codes, press the “Read” toggle on the code reader or scan tool. Copy the code or codes in the correct order. This document can be used as a reference in the future or when a repair is required.

Step 3

Depress the “Erase” or “Clear” toggle on the code reader or scan tool to clear the trouble codes. When you clear the trouble codes, the Check Engine light will automatically switch off or be reset.

About The Author

Avatar for Ibrar Ayyub

Ibrar Ayyub

I am an experienced technical writer holding a Master's degree in computer science from BZU Multan, Pakistan University. With a background spanning various industries, particularly in home automation and engineering, I have honed my skills in crafting clear and concise content. Proficient in leveraging infographics and diagrams, I strive to simplify complex concepts for readers. My strength lies in thorough research and presenting information in a structured and logical format.

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