An automobile dictionary meaning of the code is important thing when the right meaning of the code is not found. The engine P2426 Code has automobile dictionary meaning and you need to know the meaning if it is important to know for solving the car engine problem. The automobile dictionary meaning of the car engine P2426 Code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 4 for Transmission. 2 for Air Conditioning (A/C) Clutch Feedback Circuit High Voltage and 6 for Cruise Control System – Vehicle Accel Too High.