The 2016+ Utility does not use IKTs for remote start. Unfortunately Ford changed the setup on the 2016+ Utility and a VSS (Vehicle Security System) module along with a 1000' long range separate remote start FOB must be used. This is a plug and play installation. You must also install a hood switch (if not equipped see above for part #) and have OEM keyless entry (either from the factory or via my KE activation file). Contact your Ford dealer for more information. You can also check www.accessories.ford.com or such places as eBay. It uses the same kit as the same year Ford Explorer with keyed ignition. You can get kits with one way remotes, two way remotes or even cellular control. Functionality is enabled via Ford IDS.
Pic of one-way remote start/alarm kit
Photo of 5 button (164-R8000) IKT, hood switch (BT4Z-19G366-A) and 4 button (164-R8067) IKT
I am no longer selling IKTs. These can be obtained on line such as eBay. There are some Ford dealers that sell on eBay that you may be able to obtain descent pricing on. There are generic knock-offs of the IKT and I will not give an opinion on those either way.
2013-2017 Ford Police Interceptor Sedan and 2013-2015 Police Interceptor Utility also have factory remote start capabilities built into them. First your PI vehicle must have factory keyless entry. If it does not you can have it enabled. Please see the keyless entry page. The PI vehicle must have also have a hood switch. It will only have this if it was factory ordered with the perimeter alarm which would also mean it has keyless entry. As long as keyless entry and the hood switch are present the vehicle is capable of having the basic factory remote start enabled and would use an IKT (key with FOB built in) to control the remote start function. A basic KE fob only will not control remote start.
Enabling remote start requires nothing special from me. This is a direct function of the dealer programming software known as IDS that your local dealer would have.
To understand how the OEM remote start system works visit the Ford Owner website and download the Taurus or Explorer Owner's Manual for the year of your Police Interceptor.