Will Your Car Fail Emissions If Check Engine Light

If you’re like most drivers, you probably take your car’s emissions test very seriously. But what happens if your car’s Check Engine Light comes on? In this article, we’ll explain what the Check Engine Light is and what it means, as well as how to fix common problems that can cause it to come on.

What is the Check Engine Light?

The Check Engine Light is a warning light that may come on in your car’s dashboard. The light usually means there is something wrong with the car’s engine, and you should take it to a mechanic to have it checked out.

What to do if your Car has a Check Engine Light

If you’re having problems with your car’s emissions, there are a few things you can do to check if the problem is actually with the car itself or if it’s just a warning light. Here are three things to check:

1. Change the air filter. A dirty air filter can cause your car to emit more pollutants than necessary. If the problem persists after you’ve replaced the air filter, it may be indicative of a bigger issue with your car’s emissions system.

2. Check the oxygen sensor. If your car has been emitting strange odors or has been difficult to start, it may be because of an issue with the oxygen sensor. If this is the case, your car will need to be taken in for repairs.

3. Replace the catalytic converter. A failing catalytic converter can lead to excessive emissions from your car. If you notice that your car is emitting more pollutants than usual and the problem seems to be worsening, it may be time to replace the converter.

Causes of the Check Engine Light

If you’ve ever had your car’s Check Engine Light turn on, you’re not alone. The light can be triggered by a variety of problems, from faulty emissions equipment to airbag sensors. Here are the most common causes of the light and what to do if it goes off:

1. Emissions Control System (ECS) Malfunction: One of the most common reasons for the Check Engine Light to turn on is a problem with the car’s emissions control system. This could involve anything from a clogged catalytic converter to a faulty oxygen sensor. If you experience strange smells or difficulty starting your car, take it in for inspection right away.

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2. Airbag Sensor Failure: Another common cause of the Check Engine Light turning on is an airbag sensor. These sensors are responsible for detecting whether or not you’re in an accident, and if they fail, your car will trigger the light. In order to fix this issue, you’ll need to have your sensor replaced by a mechanic.

3. Clogged Catalytic Converter: A clogged catalytic converter is another common cause of the Check Engine Light turning on. 

How to Fix the Check Engine Light

If you have a Check Engine Light on your dashboard, it might be time to take it in for a check. While there’s no one-size-fits-all answer to this question, there are a few things you can do to fix the problem and get your car back on the road.

First, make sure your engine is running perfectly. If the problem is something minor, like a loose gas cap, you can fix it yourself without taking your car in for service. But if the issue is more serious, like an emission system issue, fixing it yourself may not work. In that case, you’ll need to take your car in for repair.

Here are some tips on how to deal with Check Engine Lights:

– First, identify the issue. Sometimes it’s easy to spot a problem with your car’s emissions system just by reviewing your driving habits. If you’re consistently driving under 50 mph or using high emissions vehicles (like trucks or buses), chances are your engine is struggling. In those cases, bringing your car in for service is likely the best solution.


Your car’s emissions control system is designed to detect and diagnose problems with your engine. If the problem is something as simple as a loose gas cap or air filter, then the car will typically take care of it itself. However, if the check engine light comes on, it means that there is a more serious issue with your vehicle’s emissions control system. In most cases, this issue can be fixed by replacing parts within the system, but in some cases it requires more extensive repairs. If you are concerned about whether or not your car’s emissions control system is going to fail eventually, it is best to get it checked out by a mechanic as soon as possible.

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