According to the right meaning of the code, you can easily find the problem of the car engine. The car engine P1622 Code is found for the testing the car engine. The general meaning of the code is automobile dictionary meaning. The automobile dictionary meaning of the car engine P1622 is p is Powertrain Code Problem is related engine, transmission and emissions systems. 1 is MFG – Manufacturer Specific. 6 is Vehicle Speed Control And Idle Control System. 2 is Air Conditioning (A/C) Clutch Feedback Circuit High Voltage and 2 for A/C System High Pressure High Temperature. You must fix the car engine by an expert engineer.