Hello, I have a 2003 Getz (Hyundai) and my battery went flat last weekend. Once the battery changed, the original radio wouldn't start and ask for code001, which I think is an antitheft code. As it is a 4th hand, the code has been long lost. Do you know how I could fix it? Thanks by advance. Marion

Question edited for clarity and full 'year make model'.
Question moved to correct category.

Did you disconnect the battery when you did that work. That would mean the security needs to be reset. They seem to have a history of not starting though!!

https://www.google.com/search?q=2006+hyundai+getz+immobilizer+reset

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hacking codes are hard thing to do, simplest , easiest way is go to dealer to ask for code replacement assistance

A Dealer Reset Is At Hand ! To Clear Errer Code

Original owner may have changed the factory code. Try having dealer pull the code takes about two minutes not sure if new code will come up or just factory code. Worth a try most times no charge from dealer

Hello,

Radios have a theft-proof system that freezes the radio if power is interrupted. It was designed that way to prevent theft of the radio. The downside is your radio will be locked if you disconnect the battery for any reason, or if the battery dies. When you restore power, it will say ‘CODE‘ on the display.

• When the radio displays CODE, you may enter the code using the preset radio station buttons
• For instance, my number is 1615, so when I get the CODE on the radio’s display, I press the radio preset button 1, then the radio preset button 6, then the radio preset button 1, then the radio preset button 5.
• If your radio says OFF, leave the ignition on in the first position for 2 1/2 to 3 hours in order for it to display CODE. In certain models you can clear the OFF state by pulling the fuse for the radio (#7 in my car). That’s a bit simpler than leaving the ignition in the first position for a couple of hours — particularly if you don’t have a garage. enter the code with the above procedure, if the problem still persist, am afraid you will need to take it to electronics repair workshop for diagnose, i advice you do not do it alone in other not to complicate issues.

Take care.

If it is saying code 2, thats not a code to input anything. Its a error code for a hardware malfunction.

See if you can find the original documentation that came with the vehicle - especially anything that would have been provided when the vehicle was originally purchased. If you cannot find these documents you will need to contact Hyundai. What you will be looking for is a code to enter for the radio - the code is an anti-theft device / deterrent so proof of ownership of the radio may need to be provided in the form of the seial number of the radio.

two pìn hoñes either side of the front of the radio ,push a special tool into these holes to remove the radio

Here's a pic


Pops out, then remove 4 screws which mount the audio & instrument panel.