The engine P20DE Code is important thing for solving the car engine. You need to receive the original meaning of the code. You need to get the real meaning for solving the general meaning. The engine system, in transference with the engine control module (ECM) or powertrain control module (PCM), activates the engine P20de code solenoid valve to control oil weight to the engine mechanism that is installed in the valve system to alter valve timing between High and Low. If the engine solenoid valve has an short or open circuit, a DTC is stored. The P20de engine code looks a kind of powertrain problem.