Check Engine Light: What Does it Mean? 

You’re driving during your daily commute, and suddenly, the check engine light comes on. This indicating light is a common feature in many vehicles, but many drivers may not fully understand what it signifies. When this warning appears on your dashboard, it’s important to pay attention and take action. For drivers, it’s crucial to know what the check engine light means, common reasons for a check engine light signal, and steps you can take to address the situation.

What does a check engine light mean?

The check engine light is part of your vehicle’s onboard diagnostics system (OBD-II). This system monitors various components of your car, checking to see if they are functioning properly and meet emissions standards. When the OBD-II detects a problem that it can’t identify, it may trigger the check engine light to alert you. Though it may be something simple like adjusting your gas cap, it could be something severe. The best thing you can do is to not ignore the check engine light, as it may signal a performance or car maintenance issue.  

Five common reasons why the check engine light is on

Several issues can cause the check engine light to illuminate. Here are five of the most common reasons:

• Faulty gas cap: One of the simplest problems that can trigger the check engine light is a loose or damaged gas cap. If the cap isn’t sealed properly, it can lead to fuel escaping, which the OBD-II can detect.
• Oxygen sensor issues: The oxygen sensor monitors the amount of oxygen in your car’s exhaust. If this sensor gets triggered, it can mean that there’s a problem with your vehicle’s fuel efficiency and emissions.
• Catalytic converter problems: The catalytic converter is an important car part that helps convert harmful emissions into less dangerous substances. If the converter is not working correctly or is damaged, it can cause the check engine light to turn on.  
• Faulty spark plugs or ignition coils: Spark plugs ignite the air-gasoline mixture in the engine. If they’re worn out or if the ignition coils are faulty, it can lead to poor engine performance or potential damage which may illuminate the check engine light.
• Mass airflow sensor failure: This sensor measures the air entering the engine to help the control system inject the right amount of fuel. A malfunctioning sensor can lead to decreased engine performance and fuel efficiency.

Solid vs. flashing check engine light

When the check engine light comes on, you may notice that it will either be solid or flashing. A solid light typically indicates a non-emergency issue, like a loose gas cap or a faulty oxygen sensor. However, a flashing check engine light is a warning that something is seriously wrong, such as an engine misfire. If you see a flashing light, it may be crucial to safely stop driving and seek immediate assistance to avoid damaging your car.

What to do when the check engine light comes on

Though a check engine light might mean a range of non-serious issues, it’s always a good idea to take immediate action. When the light appears, here are some steps to take:

• Check the gas cap: Before anything else, make sure your gas cap is tightened. This can be the simplest issue to resolve and is often the most common.
• Look for other warning lights: Check your dashboard for other warning messages, like for low tire pressure or high engine temperature, that may provide additional context about the problem.
• Monitor vehicle performance: Paying attention to how your vehicle is running can help you identify an issue. You can listen for unusual sounds, check for decreased engine power, or notice any strange smells. Spotting irregular sounds or smells from your car may indicate a bigger problem that needs fixing.  
• Use an OBD-II scanner: If you have access to an OBD-II scanner, you can use it to diagnose the issue. This electronic device can provide error codes and information about warning lights that can help identify the problem.
• Seek professional help: If you’re unable to determine or fix the cause yourself, taking your car to a mechanic can help. A professional can diagnose why the check engine light is being triggered and what needs to be corrected.  

Importance of addressing a check engine light

Though small issues can trigger warnings on your dashboard, ignoring a check engine light could lead to significant consequences. Assumed minor problems may also escalate into costly repairs if left untreated. For instance, a simple oxygen sensor issue can damage the catalytic converter if not addressed. Being proactive about a check engine light appearing can keep your car running smoothly and may also save you from major expenses.  

Finding insurance with Infinity Insurance Agency, Inc.  

Assessing your car’s dashboard warnings can be essential for daily driving. If you’ve ever wondered why your check engine light is on, you now have tools to help identify the problem and take action. Another key part of driving responsibly is purchasing auto insurance. If you’re looking for car insurance or a personalized quote, you can call Infinity Insurance Agency, Inc. at 1-855-478-3705.