Here is another guy who thinks keys are coded is he wrong too. http://www.autokeysquad.com/advice/modern-car-keys-workJust a thought.. there is a difference between a coded key and a remote control key
The coded key is chipped but has no buttons.
A common misconception is that the key is coded.. Nope.
The key is a pretty inert bit of kit.. You have to program the ECU to accept the new key ( often limited to a maximum of 4 keys ).. This is why you have to take the van to the key supplier