Better to stick to pre emission/no computer machinery…. It’s complete BS what they are doing .
You can get the software. Pay the annual licensing fees, take the course to learn said software and go on your way.
There is also aftermarket software out there as well. Pay the annual licensing fees and go on your way.
Most repairs don't require a computer since a fault code will reset once the fault is fixed. If you have the code, you can figure it out.
Your unit will run by just swapping out an injector. The issue is without the software, you don't have the calibration info that is uploaded with the serial number. So it won't pass tier 4 emissions. Same for the EGR valve, and turbo actuators. But they can be swapped without a calibration as well.
How often do you really need to replace an injector though??? EGR valve???? Your turbo??
If you need to swap out an ECM, you can do what I do. Give the dealer the serial number for the unit, pay the fee to have it programmed, and have it shipped to you already programmed. The $200 fee for programming is a heck of a lot cheaper then the annual licensing fees for the sofware.
This goes the same for your vehicle. Do you have the software for your vehicles???
Or do you just use an OBDII reader to see what code it's throwing??