The engine P2477 Code is found from the car engine when the car engine code reader tests the car engine. Meaning of the code is very important thing for solving the car engine problem. If you do not know how to find the real meaning of the code, you may use automobile dictionary meaning what you will get online. The automobile dictionary meaning of the car engine code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 4 for Transmission. 7 for Vehicle Speed Output Circuit and 7 for Cruise Inhibit Control Circuit.