From carmd.com
A flashing CEL (Check Engine Light) is something serious to be concerned about. A blinking CEL indicates that your vehicle’s engine is misfiring, which could severely damage your catalytic converters.
A misfire is when one or more of your engine’s cylinders are not providing power to the vehicle, with raw fuel possibly running into the catalytic converter. Engine misfire is a severe condition that requires immediate attention to avoid expensive repairs or even a car fire!
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