The common menaing of the B2249 Code is available online but for getting the real meaning of the code, you should rely on the manufactuer and model of the car. Do not drive the car with the problem. You should fix the car engine according manufacturer information. You will get manufacturer name and model of the car. Do not drive the car with the faulty engine. There are many cars and different manufacturers set the car engine code for the engine but meanings do not remain same. That is why, read the manual of the car engine for getting the information.