If you want to study about the car engine P1807 Code, then you must go to online where you will get general meaning of the code. Do not use wrong meaning of the code what may make more problem in the car engine. You must look for the meaning of the code what is found from the manufacturer of the car. The powertrain is the problem of the car engine and it is cheap to fix. The engine system, in conjunction with the engine control module powertrain control module, activates the engine code P1807 solenoid regulator to control oil compactness to the engine tool that is installed in the valve system to change valve timing between High and Low.