Have Toyota Questions? Ask a Mechanic for Answers ASAP
Hello and welcome to just answer and allowing me to assist you. what model Toyota is it? the light means you have a problem with the electrical system and needs the codes read to determine what the issue is. How is it running right now/ SOMETIMES IF MINOR IT WILL GO INTO FAIL SAFE AND TAKE AN AVERAGE READING FROM THE FAILED SYSTEM AND YOU MAY NOT NOTICE MUCH DIFFERENCE IN THE WAY IT DRIVES SO YOU CAN MAKE IT TO A SHOP TO HAVE IT SCANNED TO RETRIEVE ANY TROUBLE CODES. WITHOUT knowing THE TROUBLE CODE IT HAS STORED IT'S A GUESS WHAT IS CAUSING IT. Hope THIS HELPS your situation and if you require further assistance I'll be happy to do so.
aw it's a Prius, that makes sense. What that is indicating then is a battery problem not holding charge. take it to a hybrid shop preferably dealership and have it checked soon, don't attempt this yourself very high voltage .
your welcome and good luck most likely auxiliary battery.