The engine P1226 Code is meaningful and you should not allow any other meaning of the code except the real meaning. You may use automobile dictionary meaning of the code if the right meaning of the code is not found. The automobile dictionary meaning of the code provides only 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. 2 for Air Conditioning (A/C) Clutch Feedback Circuit High Voltage and 6 for Cruise Control System – Vehicle Accel Too High.