Sim City 4 code doesn't work

"invalid code".. It's in the wrong format (should be 5 sets of 4 alphanumeric codes separated by dashes) eg. try without dashes

"code already used".. the game code is already registered to an Origin account.

As for your issue, the "code invalid/used " message means the code is already registered to an Origin account. There can be number of reasons for this. Check if you have your Cap on

Did you purchase the disc online? Used? The game code is only redeemed once. After it has been registered to an Origin account, it becomes used.

Did you enter the code and nothing happened, then reenter it? This can be common for DVD installs. If that's the case, the code has been registered and you have to wait for the game to be activated (the game entry shows up in your My Games library) before the install will continue.

1st Make sure you are logged into the account on which the game/s were registered.
If you're getting the "code already used" message, it means the game code has been registered.

Please make sure you have "Show: All Games" in MY GAMES selected. Have also a look at "Hidden Games" because manually hidden games will not appear in the "All Games" view.

You can contact a game advisor via live chat from your computer for more information. Requires an Origin account and the installation of the Origin client.

https://www.origin.com/store/

www.origin.com/download

AHQ a public forum ,since it would involve accessing your account which we cannot do in AHQ. 

In order to solve your problem you will need to speak with at game advisor at EA Customer support:  https://help.ea.com/contact-us

For any issues redeeming game codes/packs or points, please follow these steps to contact a game advisor for more help:

1. Click the link https://help.ea.com/en/contact-us/ask and log in with your Origin name and password.

2. Where it says: ’What Can We Help you With’, type in ‘FIFA 2014’

3. Click Find Solutions

4. Select "Billing/Purchasing" from the drop-down list and also select your platform from the list.

5. Click: Find Solutions

6. Scroll down a little and on the lower right hand side, Click "I Still need Help"

The Window Will Open...
You’ll now see the currently available contact options. These may vary depending on your geographical location and the time of day. Phone or Live Chat are the best options.

For customers in North America:

• Select "Call me."
• Enter your phone number.
• Select "Submit."

For Customers outside of North America:

• Go to the "choose a contact method" section
• Contact us using the telephone number provided within the listed opening hours

Please be aware that it is likely that the agent you speak to will need to confirm information on this account.

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Hope this helps
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Questions belong in the forums. I don't answer questions via PM

I have the exact same issue with a new (still wrapped) copy of SimCity 4 I purchased at Game this afternoon.

All I get is invalid code.  there is no way you can get the code wrong so there is obviously an EA issue here.

Just wanted to play the game  - first and last time I attempt gaming on a PC.  ☹️

Same problem here. Bought from GAME, sealed and will not work!!!!!!!!! NOT IMPRESSED!!!!

1.  Simcity 4 is ancient, eleven years is forever for a game that was sold for years for $9.99 to clear out old stocks. 

2.  Answers HQ doesn't have replacement registration codes.  Only the EA Help Center's people have those. 

3.  Writing in here to complain cannot affect the speed that the Help Center operates at. 

4.  The correct place for messages about this antique old clunker is here: 

http://answers.ea.com/t5/Other-EA-Games/SimCity-4/td-p/17028 

Easily fixed all, had the same issue today too.

• Sign up to Origin
• Go to My Account
• Redeem Product Code
• Download Origin Client
• Install
• Goto My Games
• Install Sim City 4k

ahh ya but when you go to redeem your code (to assign the cd code to your acount, the code is so old (mine is) that it only has 16 letters and numbers not the 20 they use today.

You are all  STILL lost to use this thread. 

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@robailey967 wrote:
try the code it say i already use the code issue to my i just want sim city back in my library so i can get to it please fix that

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Once you've used the code to purchase a game, it's no longer valid. The game is tied to your Origin account and will be in your library.

If you purchased and installed SimCity before, and now you can't find it in your game library, it's usually a case of being logged in to the wrong Origin account. Try using any other email addresses you may have had in the past. (You can try "reset password" for your other emails, see if any of them get a reply; if so, that is probably the account you used for purchase). Once you find the account and game, you can use the steps in the help article What to do if you accidentally made a second EA account to combine them.

If it's not the wrong account, you might have accidentally set a filter in your library to only show "Games Played this Week" or "Installed Games". Go to "My Games", under "Show", make sure it's displaying "All Games".

If it's not any of those, then contact an EA Game Advisor and explain the situation to them so they can help you in recovering your original account: https://help.ea.com/en/contact-us/new

Good Luck!