2003 Vauxhall Corsa 1.0 easytronic key only works when it feels like to start

Tried another key ?

Trying to start and getting a flashing f on the dash and it’s not trying at all

Then later in it will start

Very strange

Usually means there is a fault with the tiptronic gearbox control unit . There are so many possible causes that you need it scanned for fault codes with Tech 2 /3 or similar that will cover all modules