Uh-oh. After backing out of my driveway yesterday, the hybrid warning light came on. It said to turn engine off and restart. After that the light went away and I drove my regular 25 mi commute. This morning it happened again. Ambient temp is around 55F. The car has 56000 miles. I've heard that sometimes this light says to contact the dealer immediately, so I guess it has a way of judging the severity. I wish I had some way to diagnose this because it will be a while before I can get to a dealer.