I bought my 2003 Honda Civic and just changed the battery and now some "code" appears on the dash and no audio is available. Also, it wasn't sold to me with the manual.

Check your ignition switch.

If you bought the car new, it should have come with a small credit card sized card with the radio code. If you bought it used, it may be in with the owners manual or other paperwork. If no avail, you will need to contact Honda with the VIN number to get the code.

Try to locate the unique code number that will unlock the theft-protected audio system on your 2003 Honda Civic. It probably was imprinted on an anti-theft identification card that you should have received when you acquired the car. The code was printed on a document that came with your owner's manual packet

If you do not have the code, you will need to track down the audio system's serial number. In the case of the 2003 Honda Civic, finding the serial number may require seeking assistance from a Honda dealer. The dealer should be able to determine the audio system's special code number so you can reset the radio. With some newer Honda Civic models, the serial number can be retrieved electronically from the radio.

If you are able to locate the serial number of your 2003 Honda Civic's audio system without a dealer's assistance, you can obtain the special code by going online to the Honda Web site. You must first provide specific information to prove you own the car. For instance, you will need the Civic's vehicle identification number, or VIN, and the audio system's serial number.

When you know what the audio system's special code number is, use the preset buttons on the car radio to punch in the digits. This should reset the audio system, enabling you to resume using the radio and the CD player.


Read more: How to Reset Radio Information on a 2003 Honda Civic ' eHow.com http://www.ehow.com/how_6056947_reset-information-2003-honda-civic.html#ixzz1FGPZq81d

many peolple and parts store sales persons as well. they should have used a memory saver.you need to break out your manual on audio.the code should be there, if you don't have one you can call the honda dealer with your vin number explain your problem and they will give you the code.

turn key on with your radio off then press buttons one and six at the same time while holding the buttons down press power. you will see a series of one letter and four numbers then it will blink another letter and four more numbers the combination of eight numbers is your serial number disreguard the letters....get me that and ill get you a audio code

First try
https://radio-navicode.honda.com/

If the above suggestion is not successful ,then unfortunately the code will not be available for free (or cheap ) from anywhere on the Internet.

Main Dealer or a Decoding Service only

Honda codes are available here for free

https://radio-navicode.honda.com/

If not then try your Main Dealer or a Decoding Service

Contact Honda with the Vin number and they will issue you the code I beleive they charge 50.00 for the code, So make sure you place the code in a safe place when you get it.

first of all recharge the battery

THE DEALER SHOULD BE ABLE TO TELL YOU BY THE VIN NUMBER IF THE CAE CAME WITH A FACTORY KEYLESS ENTERY THAN YOU CAN BUY THE REMOTE PAD AND PROGRAM IT