Best price I've seen yet for a pair, they are oem but are refurbished https://www.ebay.com/itm/OEM-FORD-F1....c100005.m1851

 

That sounds about right. My 82 year old dad just bought a new (used) 2013 that only came with 1 3 button key (no remote start). I bought an aftermarket key off ebay that was a dud. The local Ford dealer said they didn't want to cut an aftermarket key because the metal is harder and it could ruin their machine. So I sent my dad to the local hardware store to cut the key. I told him if it doesn't work on the door locks don't even go to the dealership to get it programmed. So he gets the key cut and goes the dealership to get it programmed. He comes back and the key works in the ignition but it doesn't unlock the doors, but it will turn right to lock the doors, Also the the 3 buttons on the remote don't work so you can't lock or unlock the doors or set of the alarm with the buttons on the fob. I don't understand why the buttons don't work because the dealer programmed it to work in the ignition and it will start the truck....and of course the hardware store screwed up too because the key will only lock the door but not unlock it. I told him to try it first before he went and got it programmed but he felt like wasting $60 so he didn't listen.

 

The message "could not program integrated key" means the system's memory slots for the remote convenience features are all full (limit is four) or that the convenience features did not properly program. The key will still work regarding PATS, though. Some of the aftermarket keys I've run across require a separate programming process for the convenience features after it's PATS programming is complete. Perhaps you're running into something related to lack of complete compatibility.

The key, unless a clone, contains an RFID chip that contains a unique serial/ID number. Clones are provided, often by hardware stores and the like, that use a OTP (one time programmable) RFID chip that accepts the number from the original thus making it a clone. As far as the vehicle is concerned, you are 100% correct. The vehicle's system only reads the data from the key and then stores it.

 

Ahh IC, Didn't know aftermarket keys were one time only. Then again I never recommend them to begin with so I've never run into that issue.

 

It's only a very specific subset of aftermarket keys that are clones. These are keys that are copied in the store, both mechanically and electronically, with no connection to the vehicle required.