A lot of people worry whenever they see the check engine light illuminated on their car's dashboard. While there's no reason to panic, the light should not be ignored. This engine-shaped icon indicates that something is wrong under the hood. Whether you need extensive engine repair or a parts replacement depends on why the light is on in the first place.

3 Reasons the Check Engine Light Is On

1. Loose Gas Cap

Something as simple as a loose gas cap is enough to cause the engine light to come on. That’s because a loose or damaged cap can cause fuel emissions to leak out of your tank, reducing your vehicle’s fuel efficiency. Just tightening the cap is enough to fix the problem. However, if the cap won’t screw shut, ask your local auto mechanic to order a replacement and install it for you.

2. Defective Spark Plugs

Spark plugs are used to seal your car's combustion chamber. They also provide the “spark” that fires up the fuel in your car's engine. These vital components typically last up to 100,000 miles. A jolting sensation when you accelerate could be a sign that your spark plugs are defective. Have a technician who specializes in engine repair diagnose and fix the problem.

3. Oxygen Sensor Needs Replacement

A malfunctioning oxygen sensor is one of the most common reasons for check engine lights to become activated. The sensor is used to check that the engine is burning the right amount of fuel and is working at optimal levels. However, the oxygen sensor can become covered with combustion byproducts like fuel additives, sulfur, and oil ash. This problem causes the sensor to malfunction since it can no longer monitor the oxygen and fuel mix in the engine. If left unchecked, your vehicle may start to exhibit surging and timing issues that require costly engine repair.

If you’re clueless about why your check engine light has come on, T. Busch Automotive in Jefferson, OH, can help you figure it out. The family-run business has provided service to Ashtabula and surrounding areas for more than five decades. Their team of automotive experts offers oil changes, tire balancing, brake repair, and engine repair among other services. You can check out their website to learn more about their services or call (440) 576-1971 to schedule an appointment.