There are many sensors on the newer cars. They communicate with the car's main computer to let it know how everything is working or if there is a problem. I don't know where you live or the state's requirements, so it's hard for me to say why they are failing it because the lights are not on. Here, in Pennsylvania, if a light is on, it fails. If there are no lights, it passes. As far as driving it, I'm not sure what they are trying to do. I can't think of anything it will change.
Let me know if you have other questions.
Joe
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Wednesday, December 16th, 2009 AT 8:05 AM