Peugeot 208 Key Replacement
It is best to leave the replacement of Peugeot keys 208 to auto locksmiths equipped with the equipment and skills. They can create and program keys quicker and more efficiently than dealerships.
A dead coin battery is most likely to be at fault if your key fob stops locking or unlocking the doors. But, there are other reasons why the key might be malfunctioning.
Dead Coin Battery
A dead coin battery will stop your Peugeot 208 from locking or unlocking, and won't start the engine. If this is the case, you'll need to utilize the backup starting method that is detailed in the owner's manual of your vehicle.
The spark plugs could also be worn out. The spark plugs light the fuel to start the engine. They have a limited lifespan. They'll eventually break down if they aren't used frequently enough.
There is a straightforward solution to this issue. The best solution is to test the voltage of your car battery with a multimeter. If it's less than 11.5 volts it is time to replace it. It is also necessary to clean the battery's contacts in case it is corroded. This can be accomplished by removing the rubber cover from the two battery terminals and then using a wirebrush to clean any damaged parts of the battery. Then, you should reconnect the positive pole cables to the negative.
Water Damage
If your 208 doesn't start and the battery is not empty, you must ensure that the spark plugs are functioning. You may find that they're dirty and don't spark. This can be fixed by cleaning the spark plugs in the workshop.
G28 Car Keys have a transponder style key that integrates with the car's immobiliser system. This ensures that only the correct key can turn the engine. If the chip inside the Peugeot key is damaged, it will not send the proper signal to the vehicle.
Water damage is a frequent cause of this issue. This is a common issue in areas with colder temperatures where the vehicle is exposed to snow or rain. In this situation, contact a trusted locksmith who has the required tools and equipment to reprogram the key. They also have the most up-to-date technological know-how and machinery required to create the Peugeot 208 smart key. The process shouldn't take more than 15 minutes.
Contacts to the battery are not working properly.
Peugeot replaced the transponder chips using a new model that is based on electronic components mounted on a circuitboard. This new system works well when it's new, but as time passes, the circuit boards start to deteriorate and stop working correctly.
This could stop the immobiliser from working, so your vehicle won't start. Contact an Peugeot specialist or a locksmith if this is the situation.
Another common issue is when the battery for the key fob is dying, this causes the blade of the key to stop being able to feed into the lock. A locksmith from your vehicle can replace the battery and cut a new blade for you, it's usually a simple fix.
Faulty Receiver Module
If your Peugeot key fob has stopped working after dropping it on the floor, being exposed to a sudden rain or accidentally washing it or washing it, it could be due to a faulty receiver module. The receiver is responsible for transmitting radio frequency signals to the onboard computer which controls the centralized locking system of your Peugeot vehicle.
Rubber seals on the key fob prevent water from reaching the electronic chip. However, prolonged exposure to water may be able to penetrate these seals and cause damage to the chip. Submerging the key fob into ocean water on the beach or throwing it into the water can be particularly damaging due to the high salt content.
The module must be replaced if your Peugeot spare key isn't working anymore. This is only completed by an experienced auto locksmith or Peugeot specialist. In contrast to other vehicles, Peugeot keys are protected by an immobilizer that is unique and requires the right coding to start the engine. It is for this reason that you should only trust a Peugeot locksmith to create and program the replacement.
Computers with faulty on-board computers
The on-board computer of your Peugeot is responsible for many of the systems in your car, including airbags and power windows. The on-board computer will show a code when something goes wrong. This code is stored in the system and will remain there until the problem is resolved. This can often mean that the on-board computers to be replaced.

One of the most common causes of the airbag light coming on is loose or corroded connections within the airbag sensor. This could be due to wear and tear, aging, exposure to salt and moisture. It is important to have this issue addressed as soon as you can, since an airbag that is not functioning properly could be dangerous in the event of an accident.
If you encounter an error message that says "card not found" on your Peugeot key fob, the battery in the key fob could be weak or dead. This will stop the key fob sending a signal that will disable the vehicle's immobilizer. Try this by pressing the unlock key on the key fob, and then trying to start your car. If this doesn't work, then the key battery must be replaced.