The general meaning of the engine P2259 Code is fully helpful and it is necessary to know the right meaning of the code first. The real meaning of the code is provided by the automobile manufacturer but the general meaning of the code is found from online as general purpose. The automobile dictionary meaning of the code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 2 for Accelerator Pedal Position (APP) Sensor 1 Performance. 5 for TP Sensor Learn Not Complete and 9 for Kick-Down Switch Failed Short. Many car engine support this meaning also.