I have a 3 years old xsara picasso 2.0 HDi engine under the hood.I never had any problems with it, but last week while I was driving home the computer made sound like beep and showed me STOP ENGINE OVERHEATING, so I stopped my car and turned it of for about 1 min, started the engine again and continued driving and everything was normal.Now this happens almost everytime I start driving the car, the thing that worries me the most is that everything else looks normal.Water, oil etc. Can somebody tell me whats the problem??? P.S the warning (STOP ENGINE OVERHEATING) remains on my display for about 1 or 2 seconds