I have a 2006 honda civic ex and experienced the same issue under similar circumstances and have since solved the issue: 1) cold weather 2) car was recently jump started 3). When that pesky green key light starts blinking on our honda civic dashboard, it means there’s an issue with the car’s immobilizer system. This guide will walk us through. Honda green flashing key security light quick fix!!! 329k views 6 years ago. Understand the flashing green key light. Check the key and ignition. Replace the key battery. Inspect the immobilizer light fuse. Reset the immobilizer system. When the green key icon comes on, that means the computer doesn't see the chip inside your key. A common problem with immoblizer systems is that the key ring or extra keys on the. 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. The mechanic was able to get it working once by placing the key in the ignition and turning on and off the ignition a few times, but once i came home with the car, it stopped. Support this video by clicking on “thanks” and donating. Thank you for considering!helpful linnks:replacement fuses: Is your fuel pump priming properly? Turn the key 2 clicks, instead of the normal 3 so that the battery light comes on. The key light (immobilizer) will also light up green! The green key will quickly flash when you put the key into pos ii but should turn off, if it flashes as you see in this video, it could be because either the immobilizer system is. A user shares their experience of fixing the green key light flashing issue on their honda civic after unplugging the a/c switch. They found out it was the pcm that fried and. The green key will come on when you turn the ignition key to the start position. If everything is working correctly the key will blink once and go dark and the car starts. Where you insert the. If the key was in the ignition at the time the charger was connected then it could have scrambled the immobiliser. Then it's a dealer fix. If the green key light is flashing on your honda civic, it is an indication that the immobilizer system is not recognizing your key. In some cases, you may still be able to. This video shows how to fix the green immobilizer light that honda has. This video is for educational purposes only. We are not responsible for any damages.