The Simpsons Hit and Run PlayStation 2 Cheats

At the main menu, select Options. At the Options screen, simultaneously press and hold L1 and R1, and then enter the following codes to unlock these cheats. If you entered the code correctly, you’ll hear a horn.
Effect / Password
Fastest Cars / Tri, Tri, Tri, Tri
Infinite Car Health / Tri, X, Tri, X