Sorry for my English, come from Germany and drive a 2004 Pacifica
1. How can I get the error code read
2. Did the radio code

 

Welcome to the forum.
You said you come from Germany. I assume you have come to the United States from Germany.
1. You can probably have your codes read at an Autozone store. Most stores will attach an OBD II code reader to your car to read your codes for free. I think they don't do that in California, however. If it's a code not related to the engine and driveability, you will probably need to go to a Chrysler dealer to have the code read on their DRB III machine. They will charge you a fee, but may apply the fee to repairs if you have the car fixed there.
2. Sorry, don't know what you are asking here.

 

Hello,
no I live in Germany and had imported because Pacifica.

Leave some error codes not in the on-board computer?

Would like to extend the battery, I need it for the radio code

 

Take the negative cable off the battery for 5 minutes. This should reset the computer. Is this what you are asking?