The B1337 Code has many dissimilar meanings and the code comes at the diagnosis of the engine. The meanings are found if you know the model and name of the manufacturer. The same code is used by multiple manufacturers for different purposes. Malfunction of the Power Steering Pressure (PSP) Switch Malfunction may be the reason of problem. For the body harness connector problem, the code may come. It seems that due to the body problem of the engine the code appears. You should also read the manual of the engine and car solving the problem of the engine. You have nothing to worry.