I have recently bought a second hand 52 plate C3 (1.4 SX) for my wife and we have, since March, had absolutely no problems with it at all. That is until last week, when the power steering seems to have taken on a mind of its own. It is a real lottery as to whether it works or not. Out of the last 10 journeys it hasn't worked at all for 3 of them. It doesn't fail mid journey but rather, right from turning the engine on and for the whole trip. The next trip it might be fine again. It doesn't make sense, or does it to some clever person out there? Any advice or have you experienced similar problems? If so, what fixed it - sensor, software? Any help would be greatfully received.