Mine isn't caused by over-temp. Freezing temps here in Germany keep it cold for a good while after starting. After about 2 minutes, though, my light starts blinking and continues until I turn the car off. Then, even hot, when I turn it on, the light doesn't come on for about 2 minutes.I'm not sure what else triggers that light to blink, but one cause is an overheating transmission. I'm not sure at what temp, but it does flash when temps get too high.