Hi, I have a 2004 Toyota Matrix with 270 000km. It's working great but today when i started my car the battery was going up to 17.2V (i have a battery voltage reader in the car at all time). It's the first time it went up there, it usually stays in the 13-14V. I know something is wrong and I want to fix it before it breaks something. I made some reasearch already and i read it could be the voltage regulator circuited between the alternator and battery. I don't know much about car's electrical system and my electric classes are a little bit far (still i am supposed to have some basic knowledge). So i'd like to know precisely what's the problem and how to fix it. Or some help or guidance, thanks a lot for any help provided !