That code means that the oxygen sensor downstream of the catalytic converter on bank 2 is detecting that the converter is not working as efficiently as it should be. It could be a bad oxygen sensor, a bad catalytic converter or and exhaust leak.
Error code P430 typically indicates that the vehicle's catalytic converter is underperforming or inefficient, often related to the bank 2 catalyst. This can result from issues such as exhaust leaks, faulty oxygen sensors, or a malfunctioning catalytic converter itself. Addressing this error usually involves diagnosing the underlying cause and potentially replacing faulty components to restore the system's efficiency.
"Three Way Catalytic Converter (TWC) system low efficiency Bank 2"