The "check engine" light, usually an orange symbol on the vehicle dashboard, can indicate a myriad of issues. The light means that the computer in your vehicle saw a fault. Something as simple as a loose gas cap can cause this light to illuminate. Also something more complex such as a transmission fault will also illuminate the same warning light. Generally speaking if the warning light comes on you should limit driving until you have vehicle assessed to avoid breakdown and further issues. If the light is flashing you should stop driving as the "flashing check engine light" indicates a damaging misfire event. This light will not come on for routine service.
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