Why Is My Check Engine Light On? Common Culprits & How to Fix Them

It’s the last thing you want to see when you get into your car. A check engine light can only mean one thing: an added expense you’re not prepared for, right? Well, not exactly, and if you’re asking yourself, “Why is the check engine light on in my new Chevy?” then let McCluskey Chevrolet help with some simple answers.

Although it’s rare that a check engine light would come on in a brand-new car, it’s not impossible, and it doesn’t always mean a costly repair. Here are some of the most common reasons for the check engine light to be illuminated and how to address them.

Why Is My Check Engine Light On? I Just Bought This Car!

The reasons can vary, ranging from a cheap and simple fix to a more serious repair, which is why it helps to work with a team that can diagnose your problem and help you get back on the road promptly. At McCluskey Chevrolet, we service all types of vehicles, and we’ve seen thousands of check engine lights throughout our years in business. So, before you panic, let’s talk about some of the most frequent issues we’ve seen in cars, both old and new.

Loose Gas Cap

Believe it or not, your check engine light may be on for something as simple as your gas cap not being completely tightened. This is quite a simple fix. All you need to do is tighten your gas cap and be on your way. It’s also important to keep in mind that bad or expired gas can cause your check engine light to come on; this will require the old gas to be siphoned out so that it doesn’t wreak havoc on your engine.

Faulty Oxygen Sensor

Although it’s one of the most important sensors residing under your vehicle’s hood, it’s fairly easy (and affordable) to replace, but it can still cause your check engine light to come on. Measuring the oxygen in your exhaust fumes, this sensor ensures that the air/fuel mixture in your vehicle is burning at a proper rate. Not only can this affect the efficiency of your vehicle, but it can also cause your car to emit harmful emissions into our atmosphere. It’s a simple part that does a lot for your vehicle, so don’t neglect this quick fix.

Bad Spark Plugs

They may be small, but they have a big job to do, allowing your vehicle to start up and get you to where you need to go. If your spark plugs have gone bad, this may prompt your check engine light to illuminate; thankfully, this is another easy fix. Failing to fix your spark plugs will result in your vehicle not being able to start when you put your key in the ignition and the battery attempts to ignite the spark plugs. From contamination to everyday wear and tear, spark plugs go bad, and it’s better to replace them before the issue gets worse.

Engine Problems

This may seem pretty vague, but there are a number of engine issues that would signal your check engine light to go on. From poor lubrication—which can result in not keeping up with regular oil changes—to bad pumps, leaking coolant, and radiator issues, several moving parts in your engine have the potential to go awry. It’s important to pay attention to your vehicle and what it’s trying to tell you so that you can get these issues addressed by professionals as soon as possible. Any type of unfamiliar knocking, grinding, or loud noises coming from your engine warrant a trip to your local service center to ensure that these essential components of your vehicle are operating properly.

Catalytic Converter Issues

Controlling vehicle emissions is a top priority in the automotive industry, which is why all cars produced after 1974 are required to include a part called a catalytic converter. This important part helps regulate the pollution emitted from your vehicle’s tailpipe, transforming all harmful pollutants into a mixture of oxygen, carbon dioxide, and nitrogen. Although a vehicle can technically operate without a catalytic converter, it’s not advised, as this will reduce your car’s efficiency and release harmful chemicals into the environment. Sometimes, they may overheat or become clogged, which could prompt your check engine light to come on. It’s best that you bring your car to the professionals to address this issue and figure out your next steps.

How to Avoid Costly Vehicle Repairs

Many of the causes we listed above are fairly easy to fix, but some of them require a skilled hand to get you back on the road. Fortunately, big problems can be avoided by keeping up with regular vehicle maintenance, like oil changes, diagnostics, and replacing parts that are prone to wear and tear. Partnering with a service department with technicians who are well-versed in working on your car will help reduce the risk of issues developing over time. They will help you move forward with confidence by designing a service plan that’s suitable for your particular car as well as your individual driving habits.

Another way to avoid costly repairs is by choosing a reliable vehicle for your journey. Not all brands are the same, and some don’t offer the level of dependability you’ll find in the respected Chevy lineup. By choosing a brand that offers top-quality vehicles, excellent warranty programs, and high-performing parts, you’ll reduce your chances of seeing your check engine light on in your vehicle. Also note that it’s always recommended that the parts you put into your vehicle be made specifically for your vehicle, which is where utilizing a reputable service center will be necessary.

Most Reliable Chevy Models

Chevy showcases a lineup of versatile vehicles designed for any driver on the roadway; although all of its models are highly regarded in the industry, there are a few that stand out from the rest. For those searching for an ultra-reliable and accommodating SUV, the large Tahoe is a top pick; from its arsenal of superior safety features to its durable build and exceptional powertrain, the Tahoe is one of Chevy’s most reliable models.

When you’re looking for a truck that won’t let you down, the Silverado has held its own across several diverse driving scenarios over its decades in the industry. Built with a strong engine, tough design, features of precision and integrity, and a meritorious reputation over the past few years makes it easy to trust your journey to this best-selling truck. Other highly regarded Chevy models include the Corvette, Malibu, Equinox, Camaro, and the Bolt EV.

When it comes to having confidence in your vehicle, choosing from a phenomenal lineup helps to avoid the chances of seeing your check engine glowing in your dash. Plus, by maintaining your vehicle and bringing it in when something seems amiss, you’ll be able to catch any issues before they become big problems. Whether it’s something as simple as a loose gas cap or a major part under your hood that needs to be addressed, when you work with a reputable service department, you won’t have to stress about your vehicle. Be sure to speak with our team regarding your vehicle’s maintenance needs. When you want to be able to travel with ultimate assurance, McCluskey Chevrolet will ensure that your vehicle is taken care of for every mile to come.