The car engine P1452 Code is necessary thing and when the problem of the car engine is fixed, the car engine code will not appear on the car engine code reader. You need to know the real meaning of the code to identify the real cause of the car engine problem. 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. 5 for TP Sensor Learn Not Complete and 2 for A/C System High Pressure High Temperature. Fixing the car engine is very important to safe driving.