You’re driving down the road when that dreaded yellow light suddenly pops up on your dashboard: the check engine light. If you find yourself asking, “Why is my check engine light on?” Here’s what it means, why it might be on, and what you can do about it.

 

What Does the Check Engine Light Mean?

The check engine light is a warning system in your vehicle that alerts you to issues with the engine or emissions system. When it lights up, it means something needs attention.

 

Why Is My Check Engine Light On?

Your check engine light could be on for a few different reasons. Some common culprits include, but aren’t limited to:

 

Loose or Damaged Gas Cap

One of the most common causes is a loose or broken gas cap. If the cap doesn’t seal properly, fuel vapors can escape and trigger the light. Try tightening the cap until you hear a click; the light may turn on after a few drives.

 

Faulty Oxygen Sensor

The oxygen sensor measures the air in your exhaust. If it stops working, it can affect fuel efficiency and emissions and activate the check engine light. Replacing the faulty sensor will usually fix the problem.

 

Malfunctioning Catalytic Converter

Your vehicle’s catalytic converter also reduces harmful emissions. If it’s not working correctly, the light could illuminate. This problem often requires professional help because, if left unchecked, it can lead to performance issues.

 

Spark Plug or Ignition Coil Problems

Worn-out spark plugs or faulty ignition coils can cause engine misfires, which may trigger the check engine light. Regular maintenance and replacing defective spark plugs can help prevent this.

 

Mass Airflow Sensor Issues

The mass airflow sensor measures how much air enters the engine. If it malfunctions, it can affect engine performance and turn on the light. Cleaning or replacing the sensor will typically solve the issue.

 

Internal Engine Problems

Sometimes, the check engine light could mean your vehicle has serious internal engine problems, such as problems with the valves or pistons. These will likely need professional diagnoses and repair.

 

What Does the Check Engine Light Look Like?

The check engine light can look different depending on your vehicle’s make and model. It might show a standard engine icon or, in some cases, display text like “CHECK ENGINE” or “SERVICE ENGINE SOON” alongside the symbol. You might see additional symbols in other vehicles, like an electrical arrow. 

Regardless of the design, it always means there’s some kind of issue.

 

Solid vs. Flashing Check Engine Light

A solid check engine light usually means a minor issue needs your attention but doesn’t pose an immediate risk. It could be a loose gas cap, a minor sensor problem, or a reminder for routine maintenance. 

On the other hand, a flashing check engine light signals a more serious problem, usually an engine misfire, which could damage your vehicle if you ignore it. 

 

What to Do When Your Check Engine Light Comes On

First, evaluate how your vehicle is performing. Are you noticing any rough idling or a loss of power? If everything seems normal, there’s no need to panic. 

Check for Simple Fixes

Before you go to a mechanic, it doesn’t hurt to check for easy fixes. Start by making sure the gas cap is tightened properly. You should also listen for unusual sounds, smells, or performance issues that could point to something more serious.

Visit a Mechanic

If the light stays on or you’re experiencing performance issues, have a mechanic run a full diagnostic to pinpoint the problem and recommend the appropriate repairs.

 

Is It Okay to Drive With Your Check Engine Light On?

It depends. If the light is solid and your car is running fine, you may be able to drive short distances, but it’s still best to schedule a diagnostic as soon as possible. Ignoring a minor issue could become a costly repair over time. 

As mentioned above, if the light is flashing or you notice symptoms like power loss, strange noises, or smoke, pull over immediately and get it checked. 

 

Has Your Car Had Repeated Warranty Issues? Contact Our Firm!

If you’re constantly dealing with repeated warranty issues on your vehicle, it may be time to explore your options. At Norman Taylor & Associates, we specialize in California Lemon Law claims and are dedicated to protecting your consumer rights. 

If your 2020 or newer car keeps having the same problem, don’t wait — call 818-244-3905 or contact us today to schedule your FREE consultation!   

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