While playing a game, press R, Black, L, A, Left, Down, Right, Up, Left, Down, Right, Up. A note will confirm that you entered the code correctly. You must enter this code multiple times to increase your total money. If this code is enabled when your car is smoking or damaged it will get repaired. During various missions where you are in a car while someone else drives and you shoot (for example, Reuniting The Families), enabling this code will instead blow the car up, failing the mission.