How many ignition cycles does my B6 have to go through before my CEL goes off? Or does it just go off after a certain period of time?

I'm asking because I had a P0300 and P0302 and it has since gone away. I thought I read somewhere once before that it goes off after 30 cycles or something. Just wanted to see if that was right?

 

Usually somewhere between 40 and 50 cycles will get rid of a code if the problem is resolved. Sometimes far fewer thou. Ive seen as few as 2 or 3 cycles. If the vehicle passes the self test for the system causing the code, it will turn off the light.