Been looking around to buy a 2005-2007 a4 never owned a Audi normally a bmw fan boy but want something different, I found a 2007 near me with a lot of highway miles, but the owner told me the epc light turn on from time to time and he says turn off car and light turn off. What is it that can be causing the epc light to turn on Is it a expensive fix. He’s asking $1,500 cause of the high miles. If someone can tell me is the car worth buying with the light turning in and off?