Peugeot 208 Key Replacement
It is best to leave the replacement of Peugeot 208 keys to auto locksmiths that have the required equipment and expertise. They can program and create keys quicker and more efficiently than dealers.
A dead coin battery is the most likely cause the reason why your key fob isn't locking or unlocking the doors. There are also other reasons for the key to be malfunctioning.
Dead Coin Battery
A dead coin battery will hinder your Peugeot 208 from locking or unlocking and will not start the engine. In this scenario you'll need to choose the alternate method to start described in your vehicle owner's manual.
Another reason your 208 might not start is because the spark plugs have worn down. The spark plugs are responsible for instigating the fuel that starts the engine. They have a limited life span. If they aren't utilized enough they will eventually fail.
There is a straightforward solution to this issue. The best way to solve this issue is to test the voltage of your car battery using a multimeter. If it's below 11.5 volts and you are not satisfied, then it is time to replace it. It is also necessary to clean the battery's contacts if it has corrosion. This can be done by lifting the rubber covers that protect both battery terminals and using a wire brush to remove any corroded components of the battery. After that, you need to connect the positive pole cables to the negative.
Water Damage
If your 208 will not start and the battery hasn't gone flat, you should check the spark plugs. It could be that they are just overly dirty, causing them not to spark. The spark plugs can be cleaned in a workshop.
Peugeot automobiles use a key with a transponder compatible with the immobiliser. This ensures only the correct key is able to turn the engine. If the chip in the Peugeot key is damaged, it will not send the correct signal to the vehicle.
Water damage is a common cause of this problem. This is a common problem in areas with colder temperatures where the vehicle is exposed to snow or rain. If this is the case, you should seek out a reputable auto locksmith who will have all the equipment and tools needed to change the key's programming. They will also have the latest technology and equipment required to create the Peugeot smart key. The process shouldn't be more than 15 minutes.
Contacts for the battery that are defective
Peugeot changed from the old carbon-encased transponder chips to an entirely new type of chip that incorporates electronic components that are placed on a circuit board. This new system works great when it's brand new, but over time the circuit boards begin to degrade and stop working correctly.
This could prevent the immobiliser chip from working the immobiliser chip, causing your car not to start. If this happens, it's best to contact a Peugeot specialist or locksmith.

Another common issue is when the battery for the key fob starts to die, this causes the blade of the key to stop from entering the lock. A locksmith in your car will replace the battery, and then cut a fresh blade for you. This is a quick solution.
Faulty Receiver Module
It could be that the receiver module is faulty If your Peugeot key fob stops working after being dropped on the floor, exposed to a sudden rainstorm or accidentally washed. The receiver module is responsible for transmitting radio frequencies to the onboard computer which controls the central locking system of your Peugeot vehicle.
The key fob itself has rubber seals to prevent water from getting to the electronic chip inside. The chip can be damaged by water in the event that it is exposed water for long periods of period of. The high salt content in the pool or ocean water can cause damage to the key fob, especially if it is submerged.
If your Peugeot spare key fob stops working You'll need the module replaced. This is only done by an expert auto locksmith or Peugeot specialist. Peugeot keys unlike other automobiles, are secured by an immobilizer system. This requires the correct code to begin the car. This is why you must choose a reputable Peugeot locksmith with the task of designing and programming the replacement.
Computer malfunctioning on-board
The computer on the board of your Peugeot is responsible for a number of the systems inside your car, from airbags to power windows. If something is wrong with these systems, it'll typically show a code that identifies the issue. This code is stored in the system and stays there until the problem is fixed. This can often mean that the on-board computers to be replaced.
The most common cause of the airbag warning light to flash is corrosion or loose connections within the sensor. This can be caused by wear and tear, aging, or exposure to salt and moisture. This issue should be addressed as soon you can, as an airbag that is not functioning could pose a risk in the event of an accident.
If you notice a card not found error on your Peugeot, the key battery inside the key fob might be weak or dead. peugeot 207 key replacement g28carkeys.co.uk will stop the key fob sending a signal to disable the vehicle's immobilizer. You can test this by pressing the unlock button on the key fob and then attempting to start your car. If this fails it is because the battery of the key must be replaced.