It's possible I have a leak, I have had the throttle body, rubber boot, idle control valve, disa valve off the car to install the ccv.
I'm pretty sure everything has been put back correctly and I replaced all gaskets along the way.
Before doing the work I've never seen these codes, no engine lights on and ista says the faults are not currently present which from my experience with ista something triggered the codes but they have not stayed active, ie when I had bsd generator fault when the code was currently present I had no charge from the voltage regulator, on changing that part and then getting a charge in ista the code changed to not currently present but remained in the history till I deleted it.