Question about 2004 Honda Accord

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Problem in programing new key

I tried making a new duplicate for my car key, i discovered the ecu would only accept one key even after repeatedly programing it with my t code programmer. it stores one and wont reconise the other. its my ECU faulty, or do i require any thing.

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Some ECU's will only allow a set maximum number of keys to be coded to them. You may need to erase all the key codes from the memory and start again from scratch. Not sure if your t code programmer will do that, not something I'm familiar with, but it may need to go to a Honda dealer for erase and recode. Not something that should take very long or be expensive. Some locksmiths do car key programming now as well and often cheaper than dealer prices, you could try around some in your area.

Posted on Nov 01, 2008

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Posted on Jan 02, 2017

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Why wont my dodge neon allow me to gain access to my ecu to program my new key, so my car will crank or start.

In order to program a new key, you have to have two working keys that are already programmed. The engine control is programmed that way to prevent a parking valet from programming their own key.
YOU MUST HAVE TWO WORKING KEYS or the controller will shut off the engine.

The locksmith should have changed the pins in the new lock to match your original key. The controller would have recognized it and let you drive the car. So, you either need to call the locksmith back to fit the old key to the new ignition cylinder, or get it to a dealer so they can instruct the brain to accept the new key. And get two keys while you are at it as a back up.

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The steering wheel is locked because the ignition is also locked, the ignition is broken so I have alternate way of starting car, how do I unlock it without turning the ignition

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Immobiliser broken

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Programming keyless entry to 95 landcruiser

1. Start with key out of ignition, drivers door is open all others closed and
drivers door is unlocked.

2. Insert key into the ignition (Do NOT Turn) and Pull key out.
3. Perform these steps within 40 seconds.
A. Using the power lock switch on the drivers door, perform 5 lock/unlock cycles
starting with lock. Use an even pace and try to go about one cycle per second.
(1Cycle = 1 lock and 1 unlock).
B. Close, then open drivers door.

4. Perform these steps within 40 seconds.
A. Using the power lock switch on the drivers door, perform 5 lock/unlock cycles
starting with lock. Use an even pace and try to go about one cycle per second.
(1Cycle = 1 lock and 1 unlock).
B. Insert the key in the ignition cylinder.
C. Turn the ignition to ON (Do NOT Start) then back to OFF.
D. Remove the key from the ignition.

5. Within 3 seconds the power door locks should cycle automatically indicating successful
entry into programming mode. Return to step 1 if the locks do not cycle at this point.

6. Perform these steps within 40 seconds.
A. Press the lock and unlock buttons on the remote simultaneously for 1 second.
B. Immediately after letting go of the lock and unlock buttons, press the lock button by
itself and hold for 2 seconds. Within 3 seconds, the door locks should cycle once
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repeat steps A and B in step 6 as your remote has not been accepted.
C. Repeat steps A and B in step 6 for each new remote.

7. Close drivers door.

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Vw beetle does not start. seems like its some kind of anti theft protection. the car/key icon lights up, it turns over for a second , then off. this is the first time this has happened, but we bought it...

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You have an electronic immobilizer key recognition problem. Now your key chip is not recognized by the transponder antenna fitted on the ignition switch barrel.

  • Everytime when you had a new key you must programm all available ignition car keys before trying to start the engine with this new key !!!
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    This warning lamp indicates that the engine is locked by the immobilizer system, and the engine start sequence must be repeat again.

    From year 1995 in Audi-VW (VAG) cars is used engine immobilizer. The VAG group immobilizer system consists of an immobilizer ECU which controls the recognition of keys and the Engine Management ECU system. Immobilizer is activated when the ignition key is removed and, together with the engine control unit, largely prevents unauthorized starting of the engine. The system uses a transmitter and receiver unit in the ignition key (transponder). Whenever an attempt is made to start the engine, it transmits a new code to the car's electronics. The immobilizing is only cancelled and car motor electronic receives permission to start engine if the key sends a right authorization code.


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    Go to dealer and bring your proof of id and paper work for vehicle. There maybe an additional programing fee, this is normal protocol. Or try a local locksmith but make sure you tell them over the phone your vehicle info.

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    My 1996 3281 will not turn over the starter and alternator are fine the fuses are fine the battery is new i just have power to the lights and windows i even got a new key when i try to start it nothing no...

    what do you mean a new key?
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