Mine does the same thing... seems pretty stupid to turn on and run like that.
Also, it ALWAYS starts when I first start the car. In Phoenix (so far, only in the winter) my garage is typically in the 50-to-65 degrees F range. I've read that this is necessary to warm the emissions-control equipment, but if it's this bad in Phoenix, I can only imagine elsewhere ... !Donald L. Good said:My driveway is on a slight upgrade, and I am usually in stealth mode when I turn the corner to enter my garage. Since the garage is level, I never use the emergency brake in the garage. Mine will start up about 60% of the time when I put it in park. The street in front of my driveway is on a steep incline for about two blocks. It seems that if I enter the garage going down hill on the street it does not restart as often as when I enter from the up-hill direction. Anyway, when it re-starts, I usually let it on ready until it shuts off which only takes 10 or 15 seconds, before I lock the Ignition key.
From the toyota-prius yahoogroup FAQ:Matt Malkin said:I am still in love with my Prius after less than a week and about 120 miles. Nearly every time I come to a stop at my destination, the gas engine will start immediately after I put the transmission selector in "P." It runs for about 15 seconds and then turns off. Any guesses about why this happens?