What are the potential reasons for the check engine light turning on in my 2015 Chevrolet Spark?

There are several reasons why the check engine light might turn on in a 2015 Chevy Spark. One common cause is a loose or cracked gas cap, which can disrupt pressure readings and trigger the light. Another culprit could be a faulty mass airflow sensor, which is an important part of the vehicle's engine management system. When the light comes on, you may also experience issues like difficulty starting, changes in throttle response, rough idling, and decreased fuel efficiency. Additionally, a malfunctioning O2 sensor is a frequent reason for the light to illuminate. This can lead to increased fuel consumption, potential damage to spark plugs, and even harm to the catalytic converter. The check engine light may also indicate problems with components such as spark plugs, catalytic converter, ignition coil, vacuum system, and exhaust gas recirculation system in the 2015 Spark.