The engine P0606 Code is important and this helps to fix the car engine’s problem. The automobile dictionary meaning of the code is not suitable and it is p for Powertrain Code Problem is related engine, transmission and emissions systems. 0 for SAE – Generic. 6 for Vehicle Speed Control And Idle Control System. 0 for IC Circuit High Voltage and 6 for Cruise Control System – Vehicle Accel Too High. You must allow the right meaning of the code online and the meaning is from the car manufacturer of the car. You do not allow meaning from different car manufacturers.