starting system fault warning

What is your question?

My truck doesn't start , but if you turn key on and off several times it finally starts . has a starting system fault on . I replaced the battery in my key faub and when I unlock it I have 15 seconds to start or security sounds go off . does the key need reprogrammed ??

What makes this problem better or worse?

nothing

How long has your 2012 Ford F-250 Super Duty had this problem?

since changing the battery in key faub