Generally a flashing cel indicates that the engine is misfiring which can damage your engine or catalytic converter.
What does it mean if my engine light comes on.
A flashing check engine light means that you need to pull over immediately as your vehicle has a serious issue that could cause severe engine damage.
The check engine light or service engine soon light is one of the most misunderstood warning lights on a vehicle dashboard.
It notably prevents gasoline fumes from leaving.
A loose fuel cap is one of the most common reasons why the check engine light turns on.
The light could be a minor issue such as a faulty gas cap.