Anti Theft Radio Code (Honda Odyssey 2004

Question edited for clarity.
Question moved to model category.

To reset the anti-theft system on a Honda Odyssey: First try holding the panic button on your keyless remote for five seconds. Then, press the lock button twice. If that doesn't work, you can remove the fuse associated with the anti-theft system for one minute.
Dec 14, 2021

How do I reset the anti-theft system on a Honda Odyssey? - Jerry

More here

https://www.google.com/search?q=2004+honda+odyssey+immobilizer+reset

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urn your ignition off to begin retrieving your radio code. Press and hold the "1" and "6" preset buttons on your radio. Turn your ignition on. Write down the code displayed on your radio. The display will flash with two numbers: one beginning with a "U" and one beginning with a "L." Write down both numbers (beginning with the "U" number), and then disregard the "U" and the "L." This number (eight digits) is your radio serial code. You'll need it to retrieve your radio anti-theft code. Contact Honda to retrieve your radio anti-theft code. You'll need your 17-digit VIN...Vehicle Identification Number, found beneath the driver's side of the windshield and your radio serial code. Honda's customer service number is (800) 999-1009. Provide the representative with the information to acquire your radio anti-theft code. You can also retrieve your radio anti-theft code online at https://radio-navicode.Honda.com/ then turn your ignition to "Acc" or "On" to power on your radio. Enter your radio anti-theft code using the preset buttons at the bottom of your radio. For example, if your anti-theft code is "55512," you would press the "5" button three times, then the "1" button, then the "2" button. This will unlock and reset your Honda radio.

you can try the above for your 2000..if you get two 4 numbers have someone write them down. then go to the web site above. you'll need the VIN too.
Unfortunately most of the time, owners of 2000 and older Honda vehicles need to physically remove the radio from the dashboard by using some automotive pry bar tools and locate the serial number sticker on the back of the unit.).

hope this helps a little

This is an anti-theft code. You need the radio serial # to get it. Hold the #`1 and #6 radio station preset buttons down at the same time and turn your radio on. A set of 4 numbers will display, then a 2nd set. these 8 #s are your serial #. You go to a Honda dealer or register online with Honda as the owner to get the code.

1. • 1 Look in your owner's manual booklet for your radio anti-theft code. The code is printed on a small card (similar to a credit card) and included with your owner's manual. If you can find the code, skip to Step 5.
     If you cannot find the code, you'll need to retrieve it.
     
   • 2 Turn your ignition off to begin retrieving your radio code. Press and hold the "1" and "6" preset buttons on your radio. Turn your ignition on.
     
   • 3 Write down the code displayed on your radio. The display will flash with two numbers: one beginning with a "U" and one beginning with a "L." Write down both numbers (beginning with the "U" number), and then disregard the "U" and the "L."
     This number (eight digits) is your radio serial code. You'll need it to retrieve your radio anti-theft code.
     
   • 4 Contact Honda to retrieve your radio anti-theft code. You'll need your 17-digit Vehicle Identification Number, found beneath the driver's side of the windshield and your radio serial code. Honda's customer service number is (800) 999-1009. Provide the representative with the information to acquire your radio anti-theft code.
     You can also retrieve your radio anti-theft code online for free at https://radio-navicode.honda.com/
     
   • 5 Turn your ignition to "Acc" or "On" to power on your radio. Enter your radio anti-theft code using the preset buttons at the bottom of your radio. For example, if your anti-theft code is "55512," you would press the "5" button three times, then the "1" button, then the "2" button. This will unlock and reset your Honda radio.
     

Each radio has its own unique code yous should be on a card in your glove box or in the owners manual if it is not there your local Honda dealer can get you the code but they need the serial number off the radio and if you did not buy it from them you may need proof of ownership.

contact your deler for an unlock code, its in the manual

If an audio unit with theft protection is disconnected from electrical power, you must enter a unique code number into the unit or it will not work. This code and the audio unit’s serial number are listed on the anti-theft ID card that comes with the vehicle. If this card is lost, you must obtain the audio unit serial number in order to get the radio code (some people say that they have found the code on a sticker inside the glove compartment, but I wouldn’t count on that). Some newer vehicles allow you to retrieve the audio unit serial number electronically from the radio. Refer to your owner’s manual for the specific procedure (the following usually will work: Turn the radio off. Push the preset 1, preset 6, and power buttons at the same time, then quickly release.)
Once you have the audio unit serial number, you can call Auto Customer Service at (800) 999-1009 or have the dealer look up the radio code.
Hope this helps you understand the process.

If an audio unit with theft protection is disconnected from electrical power, you must enter a unique code number into the unit or it will not work. This code and the audio unit’s serial number are listed on the anti-theft ID card that comes with the vehicle. If this card is lost, you must obtain the audio unit serial number in order to get the radio code. Some newer vehicles allow you to retrieve the audio unit serial number electronically from the radio. Refer to your owner’s manual for the specific procedure (the following usually will work: Turn the radio off. Push the preset 1, preset 6, and power buttons at the same time, then quickly release.)
. Some older vehicles (model year 2003 and older) require a visit to the dealer in order to retrieve the audio unit serial number. Once you have the audio unit serial number, you can call Auto Customer Service at (800) 999-1009 or have the dealer look up the radio code.
Hope this gets you started on getting it playing.

either the radio must be replaced, because honda has problems with the radio. or you need to disconnect the battery for 10 seconds then put in the radio code again

Most Honda dealer will give you the code for free. You just need to pull out the radio and get the model number and Serial number. Drive to the neareast Honda dealer ship.