It seems that the B1874 Code has the problem related with the body of the engine and it is important to know the real meaning of the code for solving the problem from the engine. As the code is started with the B alphabet, so the dictionary meaning of the code says that the alphabet B means body. However, the body problem of the engine is very easy to fix and it takes very less amount to solve the problem. You will get the same code for all car engines and if you do not solve the problem. You cannot know the right reaming, the problem remain unsolved.