While I don't have ISTA working yet I did go ahead and look over the EGR and vacuum systems for leaks and didn't see anything glaring. I'll be able to dig into it more this weekend. I drove it around quite a bit watching the live data and everything looked normal. DPF back pressure was normal and it even went into regen and completed with no issue. The 2 codes that remained are
4862 DDE: Air system, air to mass flow, plausibility
4C8C Exhaust backpressure before turbocharger, plausibility
No limp mode for now