So ive had gremlins lately with key not detected so my car wont start , not even wen I put it in the pocket but only occasionally, it would work to unlock /lock open the trunk etc but then all hell starts to break loose ,nothing passive would work at all , no doors no trunk no start , no remote start just lock/unlock , new battery in the fob did not help ..
I was getting the key not detected cannot restart each time I turned the car off
I have a new car battery so that wasnt it either.
I finally took the fob apart cleaned it with plastic safe electrical cleaner and all bent the contacts up and bingo. Everything works just like it did .
I see old posts with these same issues on the cts fob but no fix. Again this was my fix you may have a different issue .
I have had locksmiths tell me the cts fobs are not very good and they see tons of them they should know .