The general or automobile dictionary meaning of the car engine P2774 Code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 7 for Auxiliary Emission Controls. 7 for Vehicle Speed Output Circuit and 4 for Cruise Vehicle Speed/Set Speed Difference Too High. Here, the powertrain is faulty and by this meaning of the code, you can know the location of the car engine problem. So, it is easier to know the problem and take action for solving the car engine problem. However, when the car engine is fixed, a test drive is required.