Camry 2001. Today while driving after stop at a signal the car did not accelerate and some lights flashed. Then I pulled over the car and not able to start anymore after stopping. Have to tow the car home. Tested battery using voltmeter and it shows around 12.8 volt. When trying to start it shows 3 light (oil pressure, battery and check engine) and not starting at all. What could be possible problem?