The car engine P1266 Code is meaningful and it is important thing what helps to solve the car engine problem. The automobile dictionary meaning of the code can be used when it is used for solving the car engine. The automobile dictionary meaning of the code 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 6 for Cruise Control System – Vehicle Accel Too High. Solve the car engine properly and you can give this task to an automobile engineer.