Flashing Check Engine Light Then Stops – Should You Be Worried?

You see a flashing check engine light then stops. What’s going on?!

This is most definitely a concerning thing for most people. After all, your check engine light should stay on if there really is a problem. It notifies you of any issue that is happening, so you can take the right action.

But what exactly does it mean when this happens? Should you be concerned or does it mean your vehicle issue has resolved on its own? Find out more as you keep reading this post. Let’s dive into it.

flashing check engine light then stops

Flashing Check Engine Light Then Stops – What It Means

Normally, when your check engine light flashes, it means there is a problem with your vehicle. There may be a serious issue that needs to be addressed immediately. However, if suddenly the flashing stops, you may wonder what just happened.

Your check engine light indicates a problem detected by your onboard diagnostics system. Moreover, this is an issue that cannot be fixed naturally. Therefore, you will need to get the issue sorted out by a professional. Also, it is not always ideal that you keep driving if a problem has been detected.

You will notice the flashing light to be either bright orange or yellow. In this case, it means that the problem is quite serious. Now, if the light remains illuminated – which means it is not flashing or blinking – this means there is no more issue. Some people choose to ignore a blinking light, thinking that it is only a minor concern. 

While this may be true, we do not recommend neglecting a vehicle check. This is particularly true if you have also observed some symptoms of a problem. Otherwise, you may end up paying a higher amount in case the problem escalates into something bigger.

When your check engine light flashes, it is possible that there is something going on with your emissions control system. It may be a minor concern, but we do not advise ignoring the warning. If you get it checked sooner than later, this can help reduce the chances of the issue getting worse. Furthermore, it can spare you from dealing with a more serious problem that can take longer or more expensive to fix.

An early diagnosis is essential if you wish to ensure a longer lifespan for your vehicle. Plus, you can save more money along the way when you keep your vehicle well-maintained. This is why we recommend that you have the problem addressed before things take a turn to the worst.

Now, in the case of a blinking check engine light, there are many reasons why this may happen. Your vehicle is having some issues, which may include insufficient power supply. Or, it could also mean other things such as the following:

1. Oxygen sensor issue

In the event of an oxygen sensor fault, it may mean that there is a fuel combustion or fuel delivery issue. It is the job of your oxygen sensor to determine the amount of oxygen, as well as unburned fuel, that have been exhausted. If you have issues with your oxygen sensor, this also disrupts the airflow. It is also possible that there is a concern with your fuel-to-air ratio.

So, if you have a problem with the oxygen sensor, it is best to get it fixed sooner than later. In addition to the flashing check engine light, you may also notice a stalling problem or more exhaust from your vehicle. And lastly, if your oxygen sensor is broken, this can eventually impact the catalytic converter – and this means bad news for your vehicle.

2. Poor airflow sensor

Your airflow sensor has an important job of calculating how much air volume is taken into your engine. It is also one of the key parts of your vehicle’s fuel injector system. Thus, you need the airflow sensor to be working well to maintain an efficient oxygen sensor.

Another thing that the airflow does is it provides readings that your car computer analyzes, which is important in automatic transmission vehicles. When you have a faulty airflow sensor, there will be a more evident difference in the automatic transmission. So, you may notice starting issues, a flashing check engine light, and poor acceleration. Engine misfires can also occur.

3. Fuel cap is loose

While it is not a major concern if your fuel cap is loose, it can trigger an error code from your computer. Moreover, some issues with your emission system may arise when you have a loose fuel cap. This is why it is best to check if the fuel cap is loose and tighten it when you notice the check engine light has been flashing.

We also highly recommend that you check the fuel cap and keep it tightened for other important reasons. For example, contaminants may get into the fuel. Then, this can wreak havoc to your tank and other crucial components of the vehicle.

Sometimes, the fuel cap may need to be replaced when there are problems with it. The entry point of your fuel reservoir may be discolored, or you may notice a gasoline odor whenever you drive. Lastly, the check engine light may flash in combination with the above symptoms.

Read More: Causes And Fixes For Fan Still Running When Car Is Off


Having a flashing check engine light then stops can mean different things. It may be a simple issue such as a loose fuel cap, or it could spell disaster for your vehicle in the event that you have a faulty catalytic converter, worn out spark plugs, airflow sensor, and more.

This is why although it can get tempting to simply ignore the flashing of the light once it stops, you still need to have your vehicle checked by a professional. Some other problems may be present, which you may not be seeing at the moment. But if you ignore the warning and the issues become worse, it can lead to further damage and more expenses than what you can deal with.

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