hey guys, im a new c5 owner and im having a bit of trouble with one of my key fobs. i installed a new battery in it and programmed it according to the manual. the remote then works for a couple minutes but after that nothing. it doesnt work after that. i tried to program it again with the same results. it will work only for a coupe minutes and then nothing else after. any help please. thanks

Check your codes... Is your TPM system working good?

Also some fobs have been known break internally that could be fixed if you are experienced with soldering. And I've heard that some just flat wear out (could be the same issue)...