Hi. Thanks for using JA! I will try and help you out.
If you have a code 164, that means that your engine has a problem with the Injection Actuation Pressure System. This is the system that uses high pressure engine oil to activate the injectors. If there is a problem with this system, the engine will most likely not start. If it does start, it will not run well and will shut off.
The most likely cause of your problem is a failed HEUI pump. This pump is what supplies the high pressure oil to the injectors. I see this alot.
The problem could also be caused by an injector leaking too much oil. If your engine will not start, you can remove the valve cover and look and see if there is an injector leaking while the engine is cranking over.
Please let me know if you need more help or have more questions.