没有进一步的排查....

网上谁也不能确认你的问题。 要排查，应当从简单，低价的方面入手。换Cat,就算成本不高，10多年的锈烂部件，人工也不低，除非自己折腾。 

Quote:

Tech notes As the code description implies the P0430 code means that the vehicle's control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting). Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases the catalytic convert needs to be replaced to fix the problem. If the P0430 code is combined with other codes, try fixing the other codes first.

Read more: https://www.autocodes.com/p0430_toyota.html