seek to find code 504 and it will lead you that will help give you further instructions about code505!!.
You must insert the five digit code. This code was listed on 2 taps that came with the vehicle. If you cannot find the code look in the owners manual it as the code might have been written down. If you cannot find the code anywhere in the vehicle you can get it for free at the Honda owners link online. Just go there and register your Honda where you will be able to retrieve the code. Click the link.
If you have the owners manual Honda usually puts a card in the manual with the correct codes. Otherwise you will need to call the dealer. Also some salvage yards have a generic code to unlock them. Go to the Honda Owners website and sign up. With the VIN # you can get the code.
Code for WHAT
Google 'Honda "check engine"' I got it on the second link http://www.honda-tech.com/zerothread?id=1171263
You have to go to a Honda dealer and they will give you the code.
Where do I find the key less entry code on a 2001 Ford Expedition?
look in the glove box or the trunk you may find the code.
You will find the key code like most 90 models honda. where the trunk lever is. first you remove the cover and pull out the key cylinder and imprinted on the side will be the key code.
You have to enter the radio code than came with the vehicle on a small plastic card. If you cannot find the code then go to the Honda Owner's link I will post and register your Honda. You can get the code there for free.
The 2001 Honda Odyssey EGR valve is located on the outside of the air cleaner housing. You will find the valve, on the back of the housing.
The code is specific to the radio in your Honda. The dealer may be able to tell you the code. If they do not have it stored in their computer, you will need to get the Serial # off the radio. With the serial # they can find the code.