The B1946 Code is set for the engines by the manufacturer of the car and meanings for all car engines are not same. The code is important for solving the problem from engine and that is why, getting real meaning of the code is imperative to know. You will get the dictionary meaning from online but for getting the real meaning of the code, you need to know the brand and model number of the car. Real the manual of the car. The manuals of the car and car engine describe you about the brand and model number along with you will get more information.