The car engine has different code and you need to know the meaning of the code when the code appears. The car engine P3426 Code is found for the car engine and you need to know that meaning for solving the car engine. If you do not get the right meaning of the code, you can use automobile dictionary meaning of the code what is found from online. The automobile dictionary meaning of the code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 3 for SAE – Generic. 4 for Transmission. 2 for Air Conditioning (A/C) Clutch Feedback Circuit High Voltage and 6 for Cruise Control System – Vehicle Accel Too High.