Can Check Engine Light Turn Itself Off?

The Check Engine is an automatic indicator located on the vehicle’s dashboard, which is part of the on-board diagnostic system and serves to warn the driver when the engine or any of its operating systems have some kind of error.

It can be identified as “check engine”, “service engine soon” or it will simply appear with an engine icon. Therefore, if the light is on in any way, it means that the vehicle needs to be checked to determine the fault and fix it.

There are those scary moments when the check engine light stays on, and the question is whether the check engine light will reset itself after the problem has been repaired?

There also comes a time when the check engine light goes out and you don’t know why and you wonder, can check engine light turn itself off?

Can Check Engine Light Turn Itself Off?

The check engine light is one of the indicators seen on the dashboard of automobiles. Its purpose is to illuminate when the computer detects any problem in the vehicle’s transmission or emissions system, regardless of how small or serious the fault is.

A check engine light will shut itself off if the condition that caused it is remedied. Most of the time, when this light comes on, it indicates that one of the vehicle’s systems, such as ignition, fuel injection, or emission control, is not functioning properly, reducing engine efficiency and performance. Therefore, it is recommended that the vehicle be taken to a qualified mechanic.

Check engine light went off after a week?

You are experiencing an intermittent problem. The ECM is detecting a problem, such as a failure in the variable valve control system or a small EVAP leak, such as a gas cap, that needs to be addressed. Just ask someone who has access to a scanner to get the code history.

Even though the codes are not yet set as hard codes, keep track of them. The light will continue to blink until it goes out completely until the problem is resolved, at which time it will come back on. It could even be a misfire caused by a coil that only rarely stops working properly.

Is It Safe To Drive With Check Engine Light On?

It is not a pleasant experience to discover that the check engine light has come on. On the other hand, panic is not a solution. Take your time to assess the severity of the problem and determine if the vehicle is functioning properly at this time. if the car accelerates, squirms, or makes strange noises, you may need to slow the vehicle down.

If none of these things happen, you can continue driving. It is possible that the problem is in the MAF sensor or oxygen sensor. The simple line is that if your car’s check engine light is on, it means there is a problem with the engine. Make every effort to correct the problem as soon as possible to avoid serious and costly consequences.

Most Common Codes Check Engine Light

Sometimes, technicians are not able to determine the nature of the problems that are causing the check engine light to reset itself.

You will only need an OBD scanner to diagnose your vehicle. To use this scanner, you must first link it to the vehicle’s main computer, which is a simple process. With this type of scanner, your cell phone is linked to it, and you will get the trouble codes on your phone.

Oxygen sensor code (P0171-P0175)

This code indicates that your system is too rich, suggesting that there is too much fuel in the engine and too little oxygen.

Engine Misfire Code (P0300-P0305)

This code will activate if you have an engine misfire involving multiple cylinders in your vehicle.

Evaporative system codes (P0411, P0440, P0442, P0446, P0455)

A leak in the fuel tank vapor system, as well as a malfunction of the vapor pressure sensor, will result in the appearance of this code.

Exhaust Gas Recirculation Code (P0401)

This indicates that the flow rate of the exhaust gas recirculation system is insufficient.

Catalytic Converter Code (P0420, P0430)

When this code is displayed, it indicates that your catalytic converter is not operating at maximum efficiency, usually because it needs to be replaced or because the oxygen (O2) sensors are not functioning properly.


why does it mean when your check engine light comes on and then it goes off by itself?

Other factors that can trigger the Check Engine light to flash include loss of engine sensors, intermittent combustion and valve sticking or blocking, as well as failures in the EGR (exhaust gas recirculation) device or EVAP system.

Does check engine light go off by itself?

After solving the problem in most car models, the search engine light may reset itself. However, this will take some time. A car’s check engine light usually resets after 10 to 20 effective cycles. As a result, using an OBD2 scanner to reset and verify the engine indications is even simpler.

How long does it take for check engine light to go off?

The easiest and most straightforward way to stop looking at the engine light is to drive for a few minutes, and the light will go off by itself. After a few days of driving (usually three days), the engine indicator light should go out.

Final Thoughts – Can Check Engine Light Turn Itself Off

Always keep in mind that when the vehicle is started, in addition to the Check Engine Light, the other indicators on the instrument panel will also illuminate for a short period of time. Check that none of these lights remain illuminated and that they all turn on and off.

If, for example, the Check Engine icon does not illuminate, the alert may not be functioning properly, which would be a problem because there would be no way to discover if the vehicle is experiencing other, potentially more dangerous problems.


Hi, I'm the initiator and writer of this blog. Cars were and will be my first love, and my favorite hobby, that's why I decided to start this blog and write about my discoveries and techniques to improve my cars or repair them.