engine light on due to "catalyst efficiency below threshold bank 2

usally replacing the cat converters. use converters that are california certifed or the light will come on again. remember, you get what you pay for. a cheap converter is just that, cheap. Roy

This could mean a couple of things related to emissions. The catalytic converter could be shot, it's possible the oxygen sensor went out, or you could have an exhaust leak. I'd recommend taking it to an emissions specialist and get it diagnosed to find out exactly what the problem is. Check out the directory to find a local shop www.repairpal.com/directory and search for your zip code. Under each shop location it'll list whether those shops specialize in emissions or not.

02 sensor after cat.