The "Check Engine" light is a crucial warning indicator on a vehicle's dashboard, signaling that something within the engine or its related systems needs attention. When this light comes on, it can be triggered by a wide range of issues, from minor problems like a loose gas cap to more serious concerns such as engine misfires or emissions system malfunctions.

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The Check Engine light is part of the vehicle's onboard diagnostics (OBD) system, which monitors various engine components and sensors to ensure everything is functioning correctly. When the system detects an issue, it stores a diagnostic trouble code (DTC) and illuminates the Check Engine light. This code can be read using an OBD scanner, helping technicians pinpoint the exact cause of the problem.

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While the light itself doesn't indicate the severity of the issue, it's important not to ignore it. Continuing to drive with the Check Engine light on could lead to more significant damage and costly repairs. If the light is steady, you should have the vehicle checked as soon as possible. However, if the light is flashing, it usually indicates a more urgent problem, and it's advisable to stop driving and seek immediate assistance.