Prettyslow625

Just bought my c230 sport. I do love it. But getting a p0430 code. A a really rough idle.. it's intermittent. Not all the time. Balance shaft gear done. And rebuilt tranny.. which I seen was a cheap conductor board. I know it's an emission code. I only can see amg tailpipes haven't got under it completely yet. I'm hoping this rings bells. Sarcastic answers are understood and welcomed.

Plutoe

Can you post the definition of the fault, as most faults tend to be model specific??