I have had my 2013 CTS-V, 6 speed manual, sedan for 6 years. Last month I got a message that stated no key detected, one start allowed. That was after starting the car and parking it to shop. I hadn't moved my key from my pocket so I thought that was odd. When I got home I replaced the battery in both remotes. I drove the car several more times until the message popped up again. When i got home i switched to the other key fob and drove it twice with no message. Any ideas what is wrong. It has a fairly new battery for the engine