I have Prius 2005 with about 46K miles. I started getting the warning light come on, and on the screen I get roblem" and the symbol meaning -- according to the manual -- head light leveling system warning. It usually goes away after a while, but lately it often stays on longer and comes on more often than in the past. The manual says, take it to the dealer. I actually did not look at the manual before taking the car to the dealer, so I only told them I had had the red triangle with the "Problem" message on the screen. At the time I took the car to the dealer the message was not there. They did not find anything. Can anyone suggest anything?