If there is a part that needs repairing, leave it to the specialists. Unless of course, you are poised that you can behavior all these maintenances at home. You will need moderately expensive spare kit and tools for this though. The engine P2040 Code lets you the problem. The fault is produced by the variable cylinder organization method turning on and off during light throttle circumstances, at traveling speeds, or when driving on flat roads. The constant switching reasons unnecessary oil feasting and the anxiety codes look when oil heaviness drops to the view where it can no longer function the VCM system.