so i know its probably been asked 1oo times before but here it is again i have my sigma pin code and i have just purchased a second hand fob from ebay now neither will arm/disarm my car so which code will i need to reprogramme and can i reprogramme the second hand fob or do i need to see a dealer

 

Do a search for posts by me mate - on one of them (in this forum) there is the full codes for reprogramming a new fob to your system