Hi, I have a 2013 Infiniti JX35 AWD with a P0420 code and the check engine light comes and goes. Rpm is a little wobbly but the car is in great condition same as the engine. When idling, the catalytic converter has a sound as if something were loose inside. I bought it for $13,000, what should I do?
REPLACE IT! (If you have the money to do it)
If you don't feel like replacing it, get rid of the vehicle and get a Toyota product that won't have that problem with the cats.