The explanation of the B2142 Code is necessary for solving the car engine. When the car engine code reader fails to check the area of the engine, the engine code comes. The real meaning of the code is not common thing. The real meaning of the code sets by the manufacturer and model number of the car. So, car to car, the meaning of the code changes. The general meaning of this code is B for Body Code Problem is antilock brake system, electronic suspension and steering systems. 2 for MFG – Manufacturer Specific. 1 for Transmission. 4 for BBV Sensor Circuit Low Voltage and 2 for A/C System High Pressure High Temperature.