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Hello and welcome to just answer and allowing me to assist you. first of all they need to be programed with a scanner about 1/2 hr labor. they allow so many main and sub keys .The next thing is and I hope you don't shoot me for this one .if you lost the master key you may have to replace the ECU . It was designed that way for theft reasons.sorry for that news You can phone a dealer on that but I have run into this before.If you require further assistance I;ll be happy to do so.
then that must be a master, then you can program more if it is but still needs a shop scanner to do so, as I explained earlier .