regular maintenance checks for your car

There's nothing quite as alarming as seeing the check engine light come on while you're driving. Unfortunately, it's not always clear why the light has come on or what you should do about it. But don't worry, this blog will explore the most common reasons why your check engine light may be on so you can take the necessary steps to resolve the issue.

Failing Oxygen Sensor

One of the most common reasons for a check engine light to come on is a failed or failing oxygen sensor. This sensor is responsible for measuring the amount of oxygen in the exhaust system, which is then used to regulate the fuel-to-air ratio in the engine. When the oxygen sensor goes bad, it can cause a range of problems, including decreased fuel efficiency and even engine damage.

Loose or Damaged Gas Cap

Believe it or not, a loose or damaged gas cap is another common reason for a check engine light to come on. This might seem like a small issue, but it can actually cause problems with the proper functioning of the fuel system. Luckily, this issue is usually a quick and inexpensive fix. Simply make sure your gas cap is properly tightened or replaced as needed.

Faulty Catalytic Converter

The catalytic converter is a component of the exhaust system that helps to reduce harmful emissions. When the catalytic converter is faulty or failing, it can cause a range of issues, including decreased fuel efficiency, engine misfires, and difficulty starting the engine. Unfortunately, replacing a catalytic converter can be an expensive and time-consuming endeavor, so it's important to address any potential issues with this component as soon as possible.

Failing Mass Airflow Sensor

The mass airflow sensor, or MAF sensor, is responsible for measuring the amount of air going into the engine. When this component fails, it can cause a range of issues, including decreased fuel efficiency, engine stalling, and difficulty starting the engine. It's essential to address any issues with the MAF sensor as soon as possible to avoid more serious engine damage.

Dead Battery or Alternator

Finally, a dead battery or alternator can also cause the check engine light to come on. When the battery or alternator fails, it can cause issues with the electrical system of your vehicle, which can, in turn, trigger the check engine light. If your check engine light is on and you've ruled out other potential issues, it's essential to have your electrical system checked by a trusted mechanic.

For more information about what to do when your check engine light comes on, reach out to a local service.