2003 Pontiac bonnevile has a po420 code that keeps it from being registered and I just don’t have the time to deal with, could be the o2 sensors or the CAT but I’m not exactly sure, got it a few years ago as my first car and treated me pretty well, has mild exterior damage on the passenger bumper and is a little dirty on inside but nothing crazy, the car itself doesn’t have high miles and runs pretty well as a commuter, looking for cash offers and starting at 2,000$