The B1496 Code has a definition and it is important to get the meaning of the code as well. The same code is used in different cars but meaning is different. The meaning of the B1496 Code changes for the model and manufacturer. The catalytic converter contains an oxygen sensor in front and behind catalytic converter. When the car is hot and running in locked loop mode, the upstream oxygen sensor waveform analysis must fluctuate. In addition to these matters, while the company planned a hydraulically organized system that could be converted from within the car, the type they realized had to be manually altered in the engine section using hand tools.