If you see the check engine light on in your car, you might be wondering what it means and how serious it is. The check engine light is a warning indicator that alerts you to potential problems with your car's engine or emissions system. There are many reasons why the check engine light might turn on, ranging from simple issues like a loose gas cap to more serious problems like a faulty oxygen sensor or catalytic converter. Some common reasons for the check engine light to turn on include: A malfunctioning oxygen sensor A loose or damaged gas cap A faulty catalytic converter A problem with the mass airflow sensor A malfunctioning spark plug or ignition coil If your check engine light is on, it's important to have it diagnosed by a professional mechanic as soon as possible. Ignoring the light could result in more serious and costly problems down the line. At Johnny's Auto Service, our experienced technicians have the skills and expertise to diagnose and repair any issues that may be causing your check engine light to turn on. Contact us today to schedule an appointment and get your car back on the road safely.