I have this problem for about half year. The problem is that the first time I press the start button, the rpm goes to 1k for one second and then drops to zero. Then cel and battery are on. Then I have to press the button again to fully start.
Sometime I have to do it multiple time. I have gone to dealer twice and asked to change the battery and power switch. And I did it but this problem still happens sometimes (especially when the weather is cold). I have recorded a video about this probelm.
https://youtu.be/7eWEa4ATTp4
Does anyone have idea what's wrong with it.

 

How old is your car? And did your car's engine actually ran and then shut down?

 

06 and I think the engine is running.

 

your starter motor is on its way out.

 

but the engine can actually turn over.

 

Could it be the alternator? I would try to read engine codes if there are any.

 

its B2799 Engine Immobiliser System Malfunction