I have the same situation on my 2013. Key fob opens door and trunk, but the car will not start with fob in my pocket, has to be plugged into the car to start. Its annoying but getting used to it. Read one posting somewhere that said it could be because the car battery is getting old and putting out slightly less voltage. I am still on the original battery, 6 years old and 134k on the clock. Not changing the battery until it needs to be done, because apparently things then need to be re-programmed. Key fob batteries are fine.
