Hello if that focus turns on and it does not turn on or it takes to turn the car until the focus is turned off it is the immobilizer, most likely, the key has been thrown away and the key of the key has a false then when it comes to wanting to turn it on this focus appears because it takes longer to record the code and if it does not turn on the car because you need a new key and a reprogramming of the chip and the control unit.
I hope this information is helpful.