The engine P1802 Code has various meanings and the automobile dictionary meaning of the code is found online. The automobile dictionary meaning of the engine code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 1 for MFG – Manufacturer Specific. 8 for Ignition System Or Misfire. 0 for IC Circuit High Voltage and 2 for A/C System High Pressure High Temperature. The general meaning of the car engine code is helpful but you must look for the real meaning of the code first. If you find the real meaning of the code, you can easily fix the car engine smoothly.