The engine P2624 Code lets you know about the problem and you need to fix the car engine by the meaning of the code. However, if you do not know the right meaning and you have no all tools, you should not try to solve the car engine problem. The automobile dictionary meaning of the code is also useful. The automobile dictionary meaning of the code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 6 for Vehicle Speed Control And Idle Control System. 2 for Air Conditioning (A/C) Clutch Feedback Circuit High Voltage and 4 for Cruise Vehicle Speed/Set Speed Difference Too High.