For the fourth time since I bought my 2002 Prius new the scary Hybrid System Warning Light has come on. One time it was nothing at all (though it took towing to a dealer 120 miles away and all sorts of trauma to find that out). Once it resulted in them replacing my gas tank. And the most recent was two weeks ago when I ran out of gas (I know, I know!). Anyhow, I am now 350 miles from home and 75 miles from the nearest dealer so of course it has come back on. The car is driving fine. The hybrid system seems to be running fine (it switched to electric when I stopped, I'm getting fine mileage). The gas tank is 3/4 full. The local car repair shop got no codes when they hooked it up to their computer (though he did say their may be a data link he wasn't getting - his computer showed 2002 Prius, but did not have a separate category for the hybrid system). I will certainly take it to the dealer when I get home, but I'm not really sure it's worth driving 150 miles round trip to the nearest dealer the day before I'm due to head home, especially since some family members are also heading back at the same time and can be a backup ride should something go awry. Am I being too cavalier?