Flashing red light mean

If by the red light comes on upon cold startup, and the coolant level is fine, and it hasn't had time to get hot for said red light to indicate hot, then it's a stuck sending unit. If it always reads hot, the computer won't put it in cold start mode because it thinks the engine is already warmed up. That's the way it works. And especially if it isn't pushing any coolant from the radiator and over filling the reservoir, then it isn't over heating. IF it is overheating, I would first check that the fans are working properly and if they are, then I would go to the thermostat. And THAT means getting your hands dirty. You have to drain the coolant down just below the thermostat level, unbolt the thermostat housing, replace the thermostat and gasket and put it back together. The re-fill the radiator and reservoir with what you drained out.

Hi Jonna.
not sure if this will help you out,but its what i have found on the internet.

Your car's "Check Engine" or "Service Engine Soon" light can flash on for more than 1,400 different reasons, and in the coming months, we're going to share with you what some of those reasons are. The light is part of your vehicle's on-board diagnostics (OBD) system and can indicate anything from a quick fix like a loose gas cap to a major repair like a catalytic converter.
Trouble code: P0217 Engine Over Temperature
If this code is discovered, it means the engine coolant temperature is excessively high under normal engine speed. The engine coolant is overheating if it's around 240 to 250 degrees. This is a critical light! It means your engine is beginning to overheat.
In addition to the check engine light, you might also see some other type of warning on the dashboard, such as a red temperature gauge or maybe the words "engine hot."
The warning lights should come on before any damage to your engine occurs, but you need to shut the engine off as soon as possible.
or check this link out.

Does the engine light come on if the car is overheating Google Search

no oil , battery not charging , engine fault light, overheating

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Well a flashing red light usually means the alarm system has been activated. Flashing quickly could mean it is faulty and the alarm is not set.

The blue light indicates the engine is not up to operating temperature. It will go out once the engine is up to operating temperature. If it is yellow/red the car is overheating. If it is flashing the coolant is low.

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usually indicates engine is overheating, does vehicle have a engine temperature guage, is it going into the red? if so i would have the coolant level checked, if it is full you may need a new thermostat, don't delay prolonged overheating can cause permanant engine damage

The vehicle is equipped with a security system. The light means it is armed.

The gentleman above gave you the correct starting point. There are red and amber lights. Amber usually indicates a problem with the engine electronics or emissions system. Red lights are related to charging or alternator problems and engine overheating. If a light comes on you need to check the related system before you wind up disabled on the side of the highway.