The code B1219 is used for engine and when your car engine is faulty, you may get the error from the engine. It is necessary to understand the meaning of the code of the engine of the car. The meaning of the code can be different according to the manufacture and model of the car. The B1219 Code appears due to a sensor error; change of the sensor is unlikely to solve the causal problem of the engine. There are different problems are related with this problem and you need to use manual of the car and engine to solve the problem.