When you need to fix the car engine, you need to relay on automo0bile engineer. The automobile engineer will seek the real meaning of the code engine what he has found after checking the car engine by the car engine code reader. The engine P0790 Code is found when the car engine was checked. The meaning of the code is found from the car engine manual and by the name of the manufacturer and name of the car, you can find the real meaning of the code. Do not drive the car without confirming the car engine is ok. You need to test the car engine by a test drive.