Welcome to JustAnswer, my name is Dan and I'm here to help get your problem resolved. Ask follow up questions, thanks. Disconnect battery and touch cables together for 10 minutes with battery disconnected to reset system then try following relearn procedure. If relearn doesnt help vehicle will need to be scanned/programmed at dealership. Let me know if you have questions, thanks.
Bump key in start position for a second, leave in on position for 10 minutes, off 5 seconds, on 10 minutes, off 5 seconds, on 10 minutes, then start.
You can buy bypass kit from following website then you will not have to worry anymore as these sysems have alot of problems. Let me know if you have questions, thanks.