When B2146 Code appears from the engine code reader, it is necessary to fix the car engine problem. The problem of the engine is not very difficult. The problem is associated with the body of engine. Body engine problem can be solved without changing any part of the engine. While fuel use was increased, then acceleration was seriously conceded, and the harm of engine vacuum led to a hazardous loss of braking assist when the B2146 code system was in 4-cylinder mode. It is not very difficult to solve the engine body problem and no component is necessary to fix the car engine.