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How to Reset a Skoda Key I just received a message from my infotainment system to say that the battery in the key is low and must be replaced. This isn't the first time, and when I last visited an dealer, they replaced it at no cost, took 2 minutes and said it would work again. Switch on the ignition and secure the vehicle mechanically. Press the unlock button on the remote control 5 times in 1 second intervals. A short horn will sound. The EEPROM Method It can take some time for a professional car locksmith to reprogram your key if it ceases to function. In most instances, the EEPROM is analyzed to discover the unique code of the car. This process is risky and there's a chance of corrupting the information within the module. This is the reason it's best to leave it to an experienced locksmith. An EEPROM is a non-volatile memory used in a variety of electronic devices, such as car keys. It stores information, including the unique authentication codes or encryption keys that are recognised by your car when you use the key to unlock it or start it. These codes are vital because they inform the car that you have the correct key and are authorised to drive it. If your EEPROM is corrupted, the keys will cease to function. The problem is caused by pressing the wrong key or accidentally hitting the wrong key. It is possible to reset the key by using an instrument that is specifically designed for this purpose. However this method might not work. It is recommended to hire an expert with years of knowledge of programming keys for automobiles. To reset your EEPROM you must first remove the Kessy module from the vehicle. It is located above the accelerator pedal located on the left side of the car. Using a screwdriver, unscrew the single plastic clip holding it in the position. Then, disconnect the electrical connectors. Remove it. Then, you can access the EEPROM by using a SOIC8 and micro pincers connected to a programmer. Once you have the data, you can save it to a file and write it back to the EEPROM. You can use a program such as PonyProg to read the EEPROM data. Click on Read Device. The EEPROM dump will appear as a hex array of characters. There are three notable hex values: the KEY_CODE, the key_count and the V_ARG_ENABLED. To “virginize” the chip, change the other hex values to the value 00. Once you have done this, you can then flash the chip to restore its function. Ignition Method This method requires an additional key that works to turn on the car's system. It might not work on all cars however it is able to reset the key fob if it's not working or the battery has died. It will also work when the buttons have been pushed hard (a frequent cause is when people try to push down the unlock button multiple times). This method requires that you turn on the ignition and leave it on. Then, mechanically lock the car's drivers door by using a different key. Then, rotate the key fob back to its lock position and point at the transmission receiver situated on the front of the vehicle above the mirror. Press and hold the unlock button for a few seconds. The horn will sound and the key fob will start to work. If the skoda key isn't working, the transmitter inside may have become corrupted or not synchronized with the vehicle's anti-theft system. If this is the situation, it needs to be reprogrammed. A locksmith or technician can assist you in this. If skoda spare key fob doesn't function after reprogramming it, it could be because the car “forgot” the key if the car was not in use for 6 months. This should allow you to test a resync option in the user's manual. remove the driver's door lock cap and lock and then unlock the car using the key. It should re sync the key, but if it doesn't, it's a trip to the dealer. This usually works on keys that are no longer working and is less than two minutes. Keyless Entry Method The new generation of keyless entry systems – like the ones that are included in the latest OCTAVIA and ENYAQ iV cars – features one ingenious safety feature that stops thieves from “signal extension”. A signal is sent to the vehicle and then to the key, which is required to respond within a specified time. If the key does not respond the car can't be locked. The car will begin to ring alarms. A sensor in the door's handle can also be used to tell the car that the key is nearby. This works by sending a signal to the key's internal coil which in turn, responds by sending the signal to the sensor. If the sensor detects it, the car will unlock itself and activate the interior lights automatically, if configured to do so. Even the older keyless entry systems come with an traditional backup. If the remote doesn't work, you can open the driver's door mechanically, either by sliding out the blade or, with certain models, by pushing down on a button inside the door pocket. This is especially helpful when the battery of your key is dying or you've lost it. Remote Control Method If you've purchased a remote control that doesn't work in your car it could be because the seller didn't have programmed it correctly to your vehicle. It could also be because the battery terminals are loose (look for this, they could seem a bit loose the touch and sometimes soldered in the wrong place) – carefully soldering them back in place should bring your key fob back to working order. If you're not sure about this type of repair, consult a professional auto technician. Switch ignition OFF, and lock the vehicle from the inside using another key that is not compatible (this will reset the memory position 1). Enter channel “01” (may be channel “21” in certain Audi models). Insert the new keyfob in the driver door and press the unlock button twice in less than 5 seconds. Repeat this process for up to four additional remote controls. Be sure to switch off the ignition between programming each remote. You should hear a sound every time you successfully program the remote.