Not sure if HPT or EFIL can cull out TCCM and IPC DTC's.

If you leave the TCCM plugged in and you have a TC with no encoder the TCCM will set a crap load of DTC's and request the IPC turn on the message. If you unplug the TCCM the IPC will know the TCCM is no longer on the data bus and display the message on its own.