DimiPom

haven't change to new turbo but reconditioning serves exactly same purpose, you keep body and replace all parts in site for new ones.

feel for you so much, looks like I have very similar issue

Hi all, bought Audi A6 C7 2015 3.0 tdi CRT 2 months ago. On the way home glowplug light started flashing and car went into limp mode. Scanned at home p023400 turbo Overboost. Car already had Dpf cut out. I have: Reconditioned actuator Blanked off and disabled egr disabled adblue remapped to original -dpf, egr, adblue reconditioned turbo replaced MAP, MAF air manifold flushed clean from soot swirp flap replaced throttle body replaced .... after all above error still comes on and car go into limp, only noticed now coming on while engine cold/warming up while driving. Error clears every time car turn off/on but eventually comes back on when start from cold next time. I'm out of options, mechanic says maybe Ecu replace but reluctant to do, believes won't help. Suggested maybe open up turbo pressure upper threshold. I'm maybe making it up but feels like boost isn't working quite right, almost like lagging at first then overrevving 1-2 sec later. Help please! Thanks in advance.