I just bought a used 2010 Prius IV with 33,000 miles. A few times while driving, the display words "Hybrid System Indicator" were highlighted by a long pink triangle for a few seconds and then went back to normal. I've read the manual and searched various chats but haven't seen any reference to this. Does this indicate a problem that I should address or a particular driving condition? The car seems fine otherwise and I'm enjoying driving it. Thought I'd ask the question here before bringing it to the dealer. Thanks.