PCCheats
Carmageddon

Walkthroughs and Guides
Outside link to all the information you'll need on this game, and more!
Courtesy of: Gamefaqs.com

PASSCODE CHEATS
Type in the codes carefully during play.

Invincible .... SPOONREASON
Repair for free .... SPAMFRITTERS
Repair instantly .... INTHEWAR
Timer off.... SEXWITHFISH
Frozen opponents .... SPAMACCIDENTS
Faster opponents .... YUMMYLARD
Faster police .... YAKATTACK
Wall climber .... SECRETCOWS
View pedestrians on map .... ILOVENOBBY
Damage multiplier .... WEHATEMARIO
Super turbo .... SOAPYTITWANKS
Five free recovery vouchers .... ICECREAMHOLE
Granite car .... KNEEPITHAPPINESS
Finish lap .... MRCURSORSCOOL
Volcanic corpses .... ISLANDRULES
Giant pedestrians .... SMALLUDDERS
Free repairs .... SPAMFRITTERS
Explosive pedestrians .... SUPERHOOPS
Hot Rod .... IGLOOFU
Underwater ability .... GOOGLEPLEX
Instant handbrake .... SPAMFORREST
Pedestrian harvest .... TRAMSARESUPER 
Money bonus .... GIVEMELARD
Pedestrians stuck to ground .... SPAMSPAMSPAMSPAM
Pedestrians viewed on map .... ILOVENOBBY
Pedestrian electro bastard ray .... RUSSFORMARIO
Extra grip tires .... BOYSFROMTHEBUSH