Atz p042 1 fault code, after washing the fuel injector and throttle, it is like this. What is the reason and how to do it?

OBD fault codes are applicable to all automobile manufacturers. During the heating process, the efficiency of the converter is lower than the threshold (line 1).

Chemical converter (also called catalytic converter) is an exhaust gas purification device which uses the function of catalyst to convert carbon monoxide, hydrocarbons and nitrogen oxides in exhaust gas into gases harmless to human body. Generally located in front of the muffler of the exhaust pipe. The fault code indicates that the efficiency of the catalytic converter is lower than the set minimum limit before reaching the operating temperature. The fault causes include catalytic converter, oxygen sensor, circuit and connector. The failure causes include tail gas leakage near the exhaust pipe or exhaust manifold, catalyst box failure, engine coolant temperature (ECT) sensor failure, engine fire or timing lag, dirty engine oil, oxygen sensor failure, high fuel system pressure, etc.