How to Reset a Skoda Key
Just received a notification from my infotainment system say that the battery in the key is low and requires replacement. It's not the first time, and last time I visited an auto dealer, they replaced it at no cost, took 2 minutes and said it would work once more.
Switch ignition ON and secure the vehicle mechanically. Press the unlock button 5 times at intervals of one second on the remote control. A short horn will sound.
Method of EEPROM
When your car key isn't working, it could take an extended time for a professional technician to reprogram it. In many instances the EEPROM is read to find the unique code of the car. This is a risky method, as there's a good chance that the data stored in the module could be damaged. It is best to leave this to an experienced locksmith.
An EEPROM is an in-built memory that is non-volatile and can be found in a variety of electronic devices, including car keys. It is a storage device that stores the unique authentication codes and encryption keys that your car recognises when you use it to unlock the vehicle or start it. These codes are vital because they let your car know that you are the owner of the key and that you have the right to drive.
If your EEPROM is damaged the keys won't work. The issue is usually caused by pressing the incorrect key, or hitting the wrong buttons. It is possible to reset the key using a special tool. However this approach may not work. It is recommended to employ an expert who has years of experience in automotive key programming.
To reset your EEPROM, you must first remove the Kessy module from the vehicle. It is located just above the accelerator pedal on the left side of the car. Remove the plastic clip that holds it in place with the help of a screwdriver. Then, you can unplug the two electrical connectors and pull it out of the vehicle. Then, you can read the EEPROM using a SOIC8 or micro pincers attached to a programmer. Once you have all the data, you can save the file and write it back into the EEPROM.
To read the EEPROM data, you can use a program like PonyProg and click Read Device. The EEPROM dump appears as an array of hexadecimal characters. Three hex values are notable for the key_code (key_code) and the key_count (key_count) and the V_ARG_ENABLED. To skoda octavia key not detected , the chip, you must change all other hex values from 00. After you've done this, you are able to flash the chip to restore its functionality.
Ignition Method
This method involves using an additional key that works to activate the car's security system. It might not work for all cars, but it can reset the key fob if it isn't working or the battery is dead. It should work if have pressed the buttons with force (people often try to push the unlock button repeatedly).
This method requires that you turn the ignition on and keep it on. Then, mechanically lock the car's drivers door with another key. Then, rotate the key fob back to its lock position, and aim it at the receiver for transmission located in the front of the car above the mirror. Hold the unlock button down for a few minutes. The horn should sound, and the key fob will begin working.
If the skoda keys do not work, it could be that the transmitter inside is corrupted or out of sync with the vehicle's theft-deterrent system. This requires reprogramming. A locksmith or technician can assist you with this.
If the key fob isn't working after reprogramming, this could be because the car has "forgotten" the key (if the vehicle hasn't used in six months). This should allow you to try a resync procedure in the user's manual - remove the driver's door lock cap and lock and then unlock the car with that key. It should be able to re-synchronize the key, if not, it's time to visit the dealer. This is typically the case for keys that are not functioning and takes less than 2 minutes.
Keyless Entry Method
The latest generation of keyless entry systems - the type that is used in modern OCTAVIA and ENYAQ iV vehicles - has an ingenious security feature that prevents thieves from "signal extension". A signal is sent to the car and then to the key, which has to respond within a specified time. If the key doesn't reply, the vehicle cannot be unlocked and it will ring its alarms.
The car also can tell that the key is nearby with a sensor located in the door handle. This works by sending an electrical signal to the internal coil of the key, which then sends a signal to the sensor. If the sensor detects it, the car will unlock itself and turn on the interior lights automatically if configured to do this.

Even older keyless entry systems come with an older-fashioned backup. If the remote doesn't work it is still possible to manually open the driver door. You can do this by sliding the blade away or, in certain models, pressing a button in the pocket. This is especially helpful if your key's battery dies or you've lost it.
Remote Control Method
If you've purchased an electronic remote control but it doesn't work in your car, the seller might not have programmed it correctly to your vehicle. It is possible that the battery terminals have come loose. They will appear to be loose and then soldered into. Soldering them back into place should restore your key fob's full functionality. If you're not confident with this type of repair, contact an expert auto technician.
Switch ignition OFF, and lock the vehicle from inside with a second key that is not matched (this will reset the memory position 1). Enter channel "01". (Can be channel "21" on some Audi models.) Insert the new key fob in the door of the driver and then press the unlock button twice within 5 seconds (often enough to reach the next memory position).
Repeat this process for up 4 additional remote controls. Make sure to turn off the ignition between programming each remote. continue reading this should hear a tone each time you successfully program the remote.