What does the check engine light typically indicate?

The check engine light is primarily designed to notify the driver that the vehicle's onboard diagnostics system has detected an issue with the engine or its related components. This warning can encompass a variety of concerns, ranging from minor issues, like a loose gas cap, to more serious engine problems that require immediate attention. The purpose of the light is to alert the driver that a malfunction has been identified, prompting further investigation or diagnostics to accurately determine the specific issue affecting engine performance, emissions, or overall vehicle operation.

While other signals are important, such as low tire pressure, reminder for maintenance, or battery issues, these are typically indicated by different warning lights on the dashboard, each tailored to the particular aspect of vehicle health they monitor. The check engine light specifically serves as a general alert for engine-related problems.