The B1301 Code appears for the error of the engine and it is necessary to get the meaning of the code. It seems that for the body problem of the engine, the code B1301 has appeared. Now it is time to solve the problem and you can solve the problem if you know model and manufacturer. You have to use expensive tools and machines for solving the problem. The catalytic converter has an oxygen sensor in front and overdue it. When the vehicle is hot and running in shut loop mode, the upstream oxygen sensor waveform interpretation should vary. I think, you can solve the problem easily by the help of professional.