The car engine P1402 Code is necessary thing and the automobile dictionary meaning of the code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 1 for MFG – Manufacturer Specific. 4 for Transmission. 0 for IC Circuit High Voltage and 2 for A/C System High Pressure High Temperature. The engine P1402 code had an sumptuous diagnostics process, with viewing engine trouble codes on the air training display. However, the method was troublesome, misinterpreted by customers, and a rash of erratic failures led to the technology being rapidly discharged. Do not fix the car engine by yourself if you have no idea about the car engine.