The gneral menaing of the B2242 Code is B for Body Code Problem is antilock brake system, electronic suspension and steering systems. 2 for MFG – Manufacturer Specific 2 for Accelerator Pedal Position (APP) Sensor one Performance. 4 for BBV Sensor Circuit Low Voltage and 2 for A/C System High Pressure High Temperature. For solving the engine problem, this general meaning is not very important. You need to retrive the original meanin and the original menaing is connected with the automobile manuafacture and mdoel of the car. If you study well the manual and have all experience, you can easily solve the car engine problem.