Misfire detection.
The button on your dashboard
Low refrigerant charge?
No, it is not supposed to blink. You have a problem. Seek out a professional.
A low oil level can cause the oil light to blink on a 1995 Honda Prelude. A faulty sensor can also cause this.
Worn brake pads can cause the brake light to blink on the dash in a 1993 GMC Sierra 1500. This can also be caused by a faulty light.
Check to see if your gas cap is tight.
It is indicating that there is a fault with the engine of the car. You need to take it to a garage for repair/service.
A loose connection in the wiring
Computer has detected a problem with the transmission.
The same thing that causes you to blink constantly. Their eyes are dry and they are keeping them moist.
You probably have a socket grounding out.