Honda Accords sometimes show a green key on the dashboard that lights up when the car is ready to start.
That is the flashing green key that is flashing when you have your key in the on position before the motor starts. That flashing light should not be there in the first place.
If that’s what you’re getting, I will show you how to make it disappear. That green key flashing on your Accord is probably telling you that you do not have the right key inserted even though you do.
It could be a problem with the immobilization unit or the key reader, or you have a faulty key. However, the most common problem might be that a fuse is dead.
Sometimes, simply replacing the fuse might solve this problem. But, if not, there are other things that you can do to fix it.
What Is That Green Key Light On My Accord?
It is normal for the instrument panel to show an icon of a green key, but we rarely observe it. Upon turning the ignition key to the start position, the green key will come on. This light indicates the car’s immobilizer system is working.
Once the key blinks, the car starts if everything is working correctly. An immobilizer is a component around the keyhole that prevents the ignition key from turning. The device is part of the vehicle’s anti-theft system.
Key fobs contain chips that are read by this device. The car’s onboard computer will start the vehicle if the immobilizer receives the correct information.
Vehicles are uniquely identified by their VIN numbers, which have their unique code. The computer will shut down the fuel and firing systems if the code is incorrect or the reader is not functioning.
Some vehicles crank up but immediately shut off; others only turn over but won’t start. Immobilizer system problems are again indicated by the Green Key.
Why Doesn’t My Car Start?
Your Honda vehicle’s dashboard will display a green key light when you insert the key fob into the ignition.
In addition, a blinking light will appear on your vehicle’s dashboard for a few seconds before going off. The light will not disappear if there is a problem in the system.
There is a good chance that the key you have no longer works with the immobilizer system on your vehicle. Therefore, you’ll need to have your local dealership or mobile technician reprogram the car’s key.
There may be a blown fuse or a problem with the immobilizer at the root of the problem. In light of this, let’s look at the common faults of Honda immobilizers.
Honda Immobilizer Common faults
A number of Honda models have problems with their immobilizers. Immobilizer problems are most commonly reported on Hondas when the transmitter affects them. The immobilizer is usually affected by a bad Honda transmitter.
It will be necessary to replace the transmitter and immobilizer if this occurs. However, if you own any of these Honda models, you can do an immobilizer bypass.
You should make an informed decision before bypassing the immobilizer since removing the extra safety security will invalidate your insurance warranty against theft.
Although it will remove the extra security layer on your car, you can still disable your Honda immobilizer.
Fixing Green Key Flashing Honda Accord
Make sure that Fuse #9 under the hood is working. There is a power and immobilizer system for the DLC. In addition, TDC’s wire harness should be examined. It’s not uncommon for the timing cover wire to be left out of the holder.
By this time, the alternator belt has sawed the harness in half. The battery disconnected for 20 minutes after another Honda user had this problem with his 2005 Accord. He was able to solve it by letting it sit.
Your Honda accord immobilizer light can flash on the dashboard if your ACG S 15-amp fuse is blown.
The vehicle cannot be started when this light blinks on the dashboard. In most cases, starting the vehicle will be possible after replacing the blown fuse.
Throughout the years, I have learned a few tricks. Starting your Honda vehicle with a spare key that has not been programmed is generally not possible.
The trick will work, however, if you have a non-programmed spare key and your programmed key is broken.
You can do it by following these steps. First, watch as the blinking anti-theft light disappears when you place the broken key on the spare key and insert the spare key into the ignition.
How does An Immobilizer work?
It does not have any batteries or any other type of power; it just has a random code imprinted on it. The immobilizer computer sends a signal to the key when you try to start the car.
In such cases, it sends the PCM an “OK start” message if the key signal it receives matches one of the five keys it has stored. A green key light in the dash flashes if the car does not see the “OK start” signal. The device cannot be reset.
What Is Immobilizer Anti-Theft System Honda?
Honda Civic and Accord models come standard with an immobilizer theft-deterrent system. In addition, transponders are embedded in ignition keys.
It is necessary to match the transponder code on the car key with the code in the vehicle computer for the car to start. The engine won’t start if they don’t match.
How To Deactivate Honda Immobilizers?
Getting back on the road may be a matter of deactivating the Honda immobilizer if you find yourself in this situation.
This simplified guide will show you how to disable the anti-theft system on your Honda car if it has been triggered by a break-in attempt and has refused to start.
Ensure the anti-theft light is illuminated in the instrument cluster when the ignition is turned off. An orange, red, or blue light is recommended.
See if the dashboard light appears when you turn the ignition to ‘ON.’ You should allow the light to sit for 5 minutes if it stops blinking after returning the key to the ‘OFF’ position.
When the vehicle has been idle for five minutes, start it up. I am providing you with a simplified guide to resetting your Honda Accord’s immobilizer. The following method may be used if this does not work.
Alternatively, you can use this method. This has been reported to work for some Honda users. The lock button must be pressed five times. Then, press the key fob several times. If your Honda immobilizer doesn’t reset after a minute, wait a minute.
Try unlocking and locking the doors manually twice with the physical key if that does not work. Then, let the vehicle sit for 10 minutes with the ignition turned to ‘ON’ before starting.
It is possible to disable and reset Honda‘s anti-theft using this method. However, before we move forward, let’s take a look at what needs to be done.
Put the key into the lock on the driver’s side of your car. Allow the vehicle to sit for 45 seconds before starting it by unlocking the driver’s side door. Try inserting and turning the key back and forth if this does not resolve the issue.
How Do You Know If Your Car Is Immobilized?
You may be unable to start your car if the immobilizer malfunctions, just like other components of your car. Is your car immobilized? Here’s how to find out.
- It is not possible to unlock the key fob with the unlock button
- The remote control is not working to lock the car
- Unexpected failure to start the car
- Having problems with your car alarm
- Turning the ignition with the key doesn’t work
In addition to the issues outlined above, several other issues within the vehicle systems can cause them. It is possible to lock and unlock the doors with the fob if the key remote control’s battery is dead, for example.
Car alarms can also be affected by electrical issues. The engine may also fail to start for several reasons.
The Bottom Line
Almost all Honda vehicles have a green key light that flashes on the dash as a security feature. However, dash security lights from other manufacturers may flash differently.
For example, the car lock on General Motors cars flashes red when the key is turned, while the dashboard light on Chrysler cars flashes red when the key is turned.