Recently I have been unable to start the car. This happens with both keys I have. If I turn the car to the ACC position the green key light is lit and goes away (no flashing), and when I turn to start sometimes it clicks, and other times it will actually start. Today to get it to start I had to turn it on and off a few times before it would start. Is this indicative of a starter going bad, or should I look at something else? The battery voltage was about 12.5v and is about 2 years old.