The automobile dictionary meaning of the code is not highly important for solving the car engine problem. The car engine P1263 Code is in the car engine and on the engine coder reader. You need to get the real meaning of the code for solving the car engine and if necessary you can use automobile dictionary meaning what gives general information and it is p for Powertrain Code Problem is related engine, transmission and emissions systems. 1 for MFG – Manufacturer Specific. 2 for Accelerator Pedal Position (APP) Sensor 1 Performance. 6 for Control Module Throttle Actuator Position Performance and 3 for Transmission Control Module Reprogrammable Memory.