The following are known Action Replay Codes for The Simpsons: Road Rage on Nintendo Game Boy Advance (GBA).
These codes were also known as GameShark Codes and in most cases will work on both devices.

These codes are for the U.S. version of the game.

Master Code – Must Be On
02115d83
3ce583eb
4053c7c8
6b7c09f7

Press Select for More Time
7c3c025a
c50affbd
250912cb
ba26d199

Infinite Customer Time
f552d675
9756647d

Press AR Button: Extra Cash
0fb91ab3
ec9ad1a8
fdf15b0c
57b546bb

Have All Drivers
fab48988
3b18975f

Have All Locations
5960ac9a
361401dc

Have All Missions
62bb7cd2
682fe662

Have All Extras
983b9290
b8dff2c4

Infinite Time on Mission 1, 3 & 5 – 9
8df268b1
1d9330ad

Low Time on Mission 2
b2c5ed01
9a59da33

Infinite Time on Mission 4 & 10
00ce0775
8bf29aa6