Why Is My Hyundai Check Engine Light On?

hyundai check engine lights

Not sure why your dashboard’s digital display now shows the Hyundai check engine light? A wide array of issues can cause a check engine light to come on, some more serious than others. The Hyundai check engine light typically comes on when repairs are necessary for your car or when an engine problem is discovered. Please read on for more information.

What Does The Check Engine Light Mean?

The check engine light on your Hyundai is one of the lights or indicators that are most frequently misinterpreted. The onboard diagnostics system’s check engine light has a few different ways to display it.

It can say “Check Engine”, it can be a symbol of an engine, and it can even be a combination of both. This light, which can be either amber or red, is a part of your car’s diagnostics system. Since the 1980s, onboard computers have increasingly controlled and tracked vehicle performance and have a variety of functions for your Hyundai.

Name a few, some of these include managing engine speed, timing the ignition, shifting automatic transmissions, and putting stability control in place.

Having said that, the check engine light can signify a number of different things. A loose gas cap is a simple example, while an engine knocking is more serious.

Common Causes Of A Check Engine Light

Loose Gas Cap

Your gas cap is either broken, loose, or simply not there. Problems with the gas cap can cause the fuel pressure to drop and the fuel vapors to escape, lowering fuel efficiency and raising harmful emissions.

Failing Catalytic Converter

In time, especially with higher mileage vehicles, your catalytic converter may become clogged with debris. The catalytic converter is a crucial component of the emissions system because it eliminates dangerous carbon monoxide.

The performance and fuel efficiency of a vehicle can be severely impacted by a failing or clogged catalytic converter.

hyundai check engine lights

Fouled Spark Plugs Or Spark Plug Wires

You will eventually require new spark plug wires or plugs over time. Your engine can start and run because your spark plugs produce a hot spark that ignites the cylinder’s air-and-fuel mixture.

Your engine may misfire, which will impact fuel efficiency, performance, and even its ability to start at all. Faulty spark plugs or spark plug wires can also result in this.

Faulty Oxygen Sensor

Your oxygen sensor may need to be replaced if it has been exposed to hot exhaust gas for a long time. The oxygen sensor gives the ECU crucial information about the air-fuel mixture.

Your car’s computer may deliver the engine with too much or too little fuel as a result of a damaged oxygen sensor. An engine that has too much fuel will produce a lot of smoke and odor, and one that has too little fuel will likely completely fail.

Faulty Mass Air Flow Sensor

The Mass Air Flow (MAF) sensor may not function properly when exposed to soiled or particle-rich air. Similar to oxygen sensors, the MAF sensor gauges airflow into the engine and aids in maintaining the right air-fuel ratio.

Your engine may misfire as a result of a malfunctioning MAF sensor, which can also reduce performance and fuel efficiency as well as expose your engine to additional risk of harm.

What To Do If Your Hyundai Check Engine Light Comes On?

No matter the situation, when the check engine light comes on in your Hyundai, we always suggest stopping by our service center so one of our knowledgeable technicians can properly diagnose and repair your vehicle.

Hyundai OBD-II Trouble Codes can be read quickly by our service technicians thanks to their modern diagnostic tools.

Although you can tell what might be wrong with your Hyundai and the gravity of the problem from the behavior of your check engine light. To help you better understand what you should do next, we’ve outlined possible scenarios:

  • The check engine light only comes on in certain conditions: Be sure to pay attention to any changes in your car’s performance if your check engine light starts to come on irregularly. Try driving your car as little as you can before bringing it in for service if you do notice a difference. You run the risk of your vehicle not starting again because most likely something is about to fail.
  • The check engine light is constantly on: Your car’s onboard diagnostic system has found a problem that needs to be fixed. It’s best to take your car in for service as soon as you can even if it seems to be operating normally in order to avoid further problems.
  • The check engine light is on and there is a noticeable performance issue: If you are noticing a consistent decrease in performance with the check engine light on, your vehicle may have automatically entered a “limp mode” to prevent additional damage. In this situation, you should tow the car directly to our service center to avoid any engine damage.
  • The check engine light is blinking while driving: Contrary to the occasional flickering light in the first instance, if your check engine light is blinking continuously, it usually means your car has a serious problem, and you should pull over as soon as it’s safe to do so. We advise having your car towed here if you are far from our service facility out of an abundance of caution.

How Do I Turn Off The Hyundai Check Engine Light?

You might need to manually reset your Hyundai check engine light if you’ve already taken your car to the Hyundai service center and are certain there are no problems with it.

One approach to accomplishing this is by first disconnecting your car battery and then, after a brief delay, reconnecting it. After this, you might need to continue driving for a few miles until the light turns off.

Yvette Brown

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