The engine P2056 Code is found after test of the car engine and meaning of this code is important for solving the car engine. 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. 0 for Fuel And Air Metering. 5 for TP Sensor Learn Not Complete and 6 for Cruise Control System – Vehicle Accel Too High. Allow an automobile engineer to check the car engine and fix the problems what he has found by several test of the car engine. When the car engine is ok, a test drive is recommended.