Cm870 low boost high egt

[Oilysnowman]

(Yesterday )tree98 Wrote:  Has the imap sensor been replaced? Is the turbo a genuine cummins (holset) replacement or an aftermarket of some kind? Is the turbo control box a genuine or aftermarket?

The intake pressure and temperature sensors are both not very old. Doesn’t rule them out, but they seem to give correct readings.
Holset turbo
Cummins turbo control box, about two years old.