Hello accent 2004 with anti theft system battery flat anti theft

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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If the vehicle starts an drives, even at 40 to 50 miles per hour the anti-theft system has nothing to do with this. The PATS anti-theft system on that vehicle disables the starter from working to deterrer vehicle theft, that's it.

overdrive light blinks ?? you have a transmission problem with the electronics .With over drive light blinking codes are stored in the computer . Need to hook up a professional grade scan tool an check for codes . Your best bet take it to a qualified repair shop that knows what it's doing.

What code?

Hello Vickie,

It sounds like your battery is dead, or if you're really lucky, your battery cables are corroded.
Pop your hood and inspect your cables at the battery, especially the Positive (Red) lead. If you see white oxidation build up, then the cables need to be removed and cleaned.
If clean, then the battery may be dead. It can be beyond its service life (sometimes there is a date code on the battery so you can determine age).
If the vehicle can be jump started; after starting, turn on heater fan and headlamps to high. If the lights are dim, then the alternator may be bad or is going bad.
Start with the battery first, then go from there.

Explain anti-theft fuse box ! what do you think this is ? There is an anti-theft system on your vehicle , called PATS - passive anti theft system .Sorry , but there is not anti-theft fuse box .
Anti-Theft -Passive Anti-Theft System (PATS) The passive anti-theft system (PATS) contains the following components:

• theft indicator
• encoded ignition key
• PATS transceiver module
• powertrain control module (PCM)
• standard corporate protocol (SCP) communication network

flat fob key batteries will be half the problem. Because the immobiliser cannot read the fob keys it probably put the system into anti theft mode as well. Replace the fob key batteries and if it still will not start, some systems will reset by using a scanner .

It is hard to give a definite answer because I don't know which and how many wires were damaged...Anti theft can be a real HEADACHE.....You can begin by disconnecting battery cables..Use your VIN number for parts,Get new ignition with a programmed factory key from dealer only.....They probably blew certain fuses and or relays when this happened...Or maybe not..Install new ignition connect battery cables..,turn switch on just to check for bad fuses and relays...Disconnect battery again...replace any fuses blown...Connect battery again...( Each time you disconnect battery it resets the computer system and should clear anti theft codes..)..make sure all doors are unlocked by using door remote key fob....Now see if vehicle will crank..If all is done correctly it should start...However I don't know how much damage was done.....It may possibly be too much work to totally disengage anti theft....You could start with removing all fuses and relays related to anti theft but disconnect battery before...I DO NOT RECOMMEND trying to disable the theft system.....You may create more headaches that you want.......Begin by trying what I described just to be safe...!!....

Did you check the battery of the car (maybe loose cable)? but if it just happen suddenly, it might be your altenator that wasn't charging your battery. I think once there's enough power gone through the car then your anti-theft system should work as normal again.

The wiring diagrams for the 95 Accent do not show any OEM (original equipment manufacture) 'anti-theft' systems.... this does not preclude the possibility that an After Market system was installed.