pg200

I purchased a 2013 Outback earlier this year and all was good. However, a couple of weeks ago I started to get intermittent power steering issues. Essential the ps would drop out and the only way to get it working would be to pull over and turn the engine off and the ps would be back. A couple of days ago it packed up completely. I’ve checked fuses, wiring and everything else I could think of. Nipped it down to my local Subaru specialist for coding and no codes were recorded. Any ideas?