I'm pretty sure one of my turbochargers has crapped out, and I'm trying to get ISTA to run the active diagnosis to help verify. I've done this before with the same car a couple months ago, and now I can't get it to run. It measures the ambient pressure like normal, I click Next, and it says "There is currently no functional check for charging pressure control available for this vehicle." No hint as to why not. Anybody dealt with this? Thanks!