Check Engine Light Diagnosis

A glowing check engine light means that the onboard diagnostic system has detected a problem affecting the emission controls. There are dozens of possibilities as to why it has illuminated. It could be something as simple as a loose gas cap, bad airflow, a bad oxygen sensor or a faulty catalytic converter. When this warning light comes on, it generates a trouble code that can be read by connecting a diagnostic scanner to the vehicle's onboard diagnostic system; that will steer your mechanic to specific areas and help find the cause. A flashing check engine light means the problem is serious enough that it warrants immediate attention to prevent expensive repairs. Stop as soon as it is safe to do so. The only way to find out what caused the check engine light to illuminate is to have a mechanic connect a diagnostic scanner to the onboard diagnostics system to extract trouble codes that will help locate the source. The sooner that's done the better.

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