Hi all,
I used this thread to help diagnose the issue on my THP 200, and found it helpful, so thought I would share what my issue turned out to be:
A failed vacuum pump.
Oil was getting into the vacuum lines (for turbo actuator only as its a separate outlet from the brake servo) from the pump which caused a blockage from the pump to the vacuum reservoir. This only came apparent after removing the vacuum lines and blowing into them. A lot of oil had to be blown out the reservoir, so worth checking.
A bit of contact cleaner, compressed air, and £40 vacuum pump from ebay and all the codes have cleared and turbo is back to full strength.
I hope this helps someone
