fabdom

Hi peoples, new here so I hope I don't mess up. My fabia 2007 2.0 has had a small issue for a while now, ignition on warning lights off engine start off I go, but! Occasionally ignition on warning lights off other than power steering light start up no power steering, turn off retry no problem, not a big problem until I gave the car a power wash within 2 minutes started car and drove away, 30 seconds later every warning you could think of lite up or started bleaping, but the steering was fine so I headed home, within 20 min lights started going out and the next day all was well other that the power steering light and this time ot just would not clear and the ps would not work. Any idea what I've done ?