Enter the cheat menu from the options screen and enter one of following codes to unlock the corresponding cheat option. Turn the cheats on and off from the cheat menu.
Result
Cheat Code
Master code [Note 1] CHEATINGMUTHATRUCKER or ATJCEHJMJ
Level select LAZYPLAYER
Bonus levels JINGLEBELLS
Evil truck VARLEY
Fast truck GINGERBEER
$10 million [Note 2] LOTSAMONEY
Infinite time PUBLICTRANSPORT or GETTHEREFAST
Disable damage 6WL
Automatic Sat Nav USETHEFORCE
Diplomatic immunity VICTORS
Small pedestrians DAISHI
Note 1: All cheats except the Evil Truck will be unlocked. If you choose to have the automatic Sat Nav, it will always take you to where you will get the best price, but you will not be able to race against the other truckers.
Note 2: You must first unlock the "Max Fruit" cheat and enable it before this code has any effect.