cm570 turbo overspeed fault

[pazz]

79254150
Last count boost was about 38psi
Engine was a rebuilt spare from a major company here, fitted by Cummins for the previous owner. Had 0 ks when I got it 3 years ago. Not sure on programming. I'm not well schooled on that side of things so tend to not stick my nose in it, but with some instruction I can check it.
No other garbage parts. Turbo is from Cummins. All other parts I've got genuine with the old combo being the only exception. I agree on parts comment. Funds were tight, works been pretty slow here last 18 months.
Matt