Getting meaning of this B1873 Code is important for solving the problem from engine. When the car engine is tested, you will get the code by code reader. This code is common for many car engines. The same code is set for all cars but meaning of the code is not similar. Real meaning cannot be known by the manual where it is possible to know the manufacturer name and model number. You can know the dictionary meaning of the code what is not enough to solve the problem from the engine but it is identified that the body of the engine has the problem.