Where do I enter cheat codes on a psp

Has your user i.d. been banned? Or, could it be that the game is old enough that the servers have been shut down and there is nothing to sign in to.

In game or in the main menu(not sure) there should be Options, hit that and look for "Cheat codes" hope you find it. Here have this.
Unlock all riding gear-CRAZYLIKEA
*Cheat may not work*

hi my says: PLAYSTATION network requires an Online ID for online play.

Do you wish to sign in?
please help

Go to Google and enter - mx vs atv untamed for money and for xbox360 cheats there is plenty pages and videos to view!

make sure the game is configured with this ID. usually in the settings of the playstation. i am not sure of this specific game, but some games require separate ID's.

for psp there is none

At the options menu pick the "cheat codes" option. I think it is in-game.

Is it your internet wireless router? do you have a strong signal? If you are connected to someone else wifi that you are picking up it is probably a weak connection. I can pick up my neibhors wireless signal and connect to it for play station shop, and the internet, but when i update the signal is too weak to do it.

are you trying to use cwcheat because if so you need to hold select down for like 10 secs max

If that doesnt work go to http://cwcheat.consoleworld.org/downloads/index.php?act=download&id=31 then download it then open it and look for install and either place the seplugins folder in your memory stick (not under psp just right away) or copy all of its contents into the seplugins folder.

Then turn off your psp completely (not sleep) and reboot it holding r trigger down before you flip the switch and then go to plugins under recovery and activate (enable) all 3 things under it wich will be Cwcheat(pops).prx Cwcheat(game).prx
and Cwcheat(game150) and then you can insert your cheat

find a cheats