The engine P1836 Code is part of the car engine and you need to know the meaning of the code I you want to fix the car engine. The engine code is important thing. The automobile dictionary meaning of the code may not explain the real problem of the car engine and it is used for getting general information of the car engine code. 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. 8 for Ignition System Or Misfire. 3 for Cruise Control Servo Indicates Low and 6 for Cruise Control System – Vehicle Accel Too High.