The car engine B1868 Code is necessary to know and it comes when the car engine is diagnosed. You need to solve the problem from the engine test. You should solve the problem before driving the car. The car engine problem is very dangerous problem and if you do not know how to solve the problem, you should take car to car repair center. You need to check the dictionary meaning and it gives you some information of the engine problem. As the code has started with the B alphabet, the body of the engine has the main problem and it is easy to fix.