 You better turn the engine off. Is that correct? No. But if it's blinking, that means 99% of the time that it's an engine misfire. One of your cylinders is misfiring, whether it's spark plug, fuel injector, engine problem, or coil, or wire, depending on your vehicle. All those things can cause that engine misfire. It's something that should be looked at quickly, but does not have to have your engine turned off.