How To Tell If You're In The Right Position For Peugeot Keys
Peugeot 208 Key Replacement
Peugeot 208 key replacement should be left to auto locksmiths with experience who have the right tools and know-how. They can design and program keys more quickly and at a lower cost than a dealership.
A dead battery for your coin is most likely to be the cause when your key fob stops locking or unlocking the doors. There are other reasons that the key could be malfunctioning.
Dead Coin Battery
A dead coin battery will hinder your Peugeot 208 from locking or unlocking and won't start the engine. In this case you'll need use the alternative starting method that is described in the owner's manual.
Another reason why your 208 may not start is that the spark plugs have worn down. The spark plugs are responsible for igniting the fuel that starts the engine. They have a limited life span. If they aren't utilized enough and they fail, they'll eventually die.
There is an easy solution to this issue. The best way to solve this issue is to test the voltage of your car battery using a multimeter. If the voltage is less than 11,5 volts, it's time to replace it. If the battery is corroded it is essential to clean its contacts. This can be done by lifting the rubber covers covering the two battery terminals and using wire brushes to clean any corroded components of the battery. Then, reconnect the positive pole cables to the negative.
Water Damage
If your 208 doesn't start and the battery isn't running, then make sure that the spark plugs are working. It could be that they are overly filthy, making them unable to spark. This can be easily corrected by cleaning the spark plugs in an workshop.
Peugeot cars are equipped with a key with a transponder that is compatible with the immobiliser. This ensures that only the right key is able to turn the engine. If the chip inside the Peugeot key is damaged, then it will not send the correct signal to the vehicle.
Water damage is a common cause of this issue. This is most common in colder climates. the vehicle may have been exposed to rain or snow. In this situation, contact a reliable locksmith who will have the necessary tools and equipment to modify the key. They will also have the latest technology and equipment needed to make the Peugeot smart key. The process shouldn't take more than 15 minutes.

Contacts with the battery may be damaged.
Peugeot changed from the carbon-encased transponder chips to a new type of chip that uses electronic components in a circuit board. This new technology works great when it's brand new, but over time the circuit boards begin to deteriorate and stop working properly.
This could stop the immobiliser chip activating which means that your car won't start. If this happens it's a good idea call a Peugeot specialist or locksmith.
The most frequent issue is when the battery of the key fob begins to fail. This causes the blade of the key to stop feeding into your lock. A locksmith for cars will replace the battery and then cut a fresh blade for you. This is a simple fix.
Faulty Receiver Module
If your Peugeot key fob stopped working after dropping it on the floor, getting exposed to a sudden downpour or accidentally washing it may be due to a faulty receiver module. The receiver module is responsible for transmitting radio signals to the onboard computer which controls the central locking system of your Peugeot vehicle.
The rubber seals on the key fob prevent water from reaching the electronic chip. However prolonged exposure to water may break through these seals, causing damage to the chip. G28 of the ocean water or pool could cause damage to the key fob if it is submerged.
The module must be replaced if the Peugeot spare key is no longer working. This is only done by a Peugeot specialist or a professional auto locksmith. Like other automobiles, Peugeot keys are protected by an unique immobilizer system that requires the right coding in order to start the engine. This is the reason that you should only trust the Peugeot locksmith to design and program the replacement.
Computer with a problem on board
The on-board computer in your Peugeot is the one responsible for all of the systems in your car, ranging from power windows to the airbags. When something goes wrong with these systems, they will usually display a code that identifies the problem. The code is stored within the system until the problem is resolved. Usually, this will mean the on-board computer being replaced.
One of the main reasons for the light turning on is loose or corroded connection in the airbag sensor. This can be caused by wear and tear, aging, exposure to moisture and salt. It is imperative to have this issue addressed as soon as possible, since an airbag that is not functioning properly could be dangerous in the event an accident.
If you encounter an error message that says "card not found" on your Peugeot, the key battery in the key fob might be dead or weak. This will prevent the key fob from transmitting a signal that will disable the immobilizer on your vehicle's standard. Try this by pressing the unlock button on the fob's key, then trying to start your car. If this does not work it is because the battery of the key is in need of replacement.