The body of the engine has the problem and for this reason, the engine B2354 Code has appeared on the engine code reader. Do not worry about the problem but do not drive the car until the problem of the car is fixed. You should read the manual of the car if you want to get some meanings of the car engine. The real; meaning of the code depends on the brand name and model number of the car. Once you have the real meaning of the code, you can solve the car engine problem easily and you have nothing to worry.