Help diagnosing codes

[Phyxius58]

I have a 2013 E 70 N63 with 99,000.00 miles on it. I am getting a 30CF and a 3100 code. From what I can figure out it's saying boost pressure control deactivation and waste gate deactivation

[Sophisticated Redneck]

Most likely something wrong with the vacuum lines used to power your wastegates, they are most likely leaking from cracking due to age and how hot these engines run. Below is what you should check/replace in order of probability.

Vacuum lines from wastegates to pressure converters, vacuum lines from pressure converters to resivoir, vacuum line to pump. If no leaks then possible bad pressure converter, if that checks out then next test wastegate actuation.

If you plan on doing this yourself, grab a laptop and load up ISTA, you will need it.

[Phyxius58]

Originally Posted by Sophisticated Redneck

Most likely something wrong with the vacuum lines used to power your wastegates, they are most likely leaking from cracking due to age and how hot these engines run. Below is what you should check/replace in order of probability.

Vacuum lines from wastegates to pressure converters, vacuum lines from pressure converters to resivoir, vacuum line to pump. If no leaks then possible bad pressure converter, if that checks out then next test wastegate actuation.

If you plan on doing this yourself, grab a laptop and load up ISTA, you will need it.

Can you explain ista, I've never heard of this