Peugeot 208 Key Replacement
It is recommended to leave the replacement of Peugeot 208 keys to auto locksmiths with the equipment and knowledge. They can program and create keys faster and less expensive than dealers.
If your key fob stopped locking or unlocking your doors it is likely due to a dead coin battery. There are also other reasons for the key to be malfunctioning.
Dead Coin Battery
A dead battery in the coin compartment will hinder your Peugeot 208 from locking or unlocking and will not allow you to start the engine. In this scenario you'll have to employ the alternate method of starting found in your vehicle's owner's manual.
The spark plugs might also be worn out. The spark plugs ignite the fuel to start the engine. However, they have a limited time of life. If they are not used 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 falls below 11,5 volts, then it's time to replace it. If the battery has corrosion it is essential to clean its contacts. This can be accomplished by taking off the rubber covers from the two terminals on the battery and then using a wirebrush to clean any corroded parts of the battery. Then, reconnect the positive and negative pole cables.
Water Damage
If your 208 isn't starting and the battery isn't flat, then you need to make sure whether the spark plugs are in good working order. It could be that they're filthy and don't spark. This can be fixed easily by cleaning the spark plugs in an workshop.
Peugeot automobiles use a transponder style key that works with the car's immobiliser system. This makes sure that only the correct key is able to start the engine. If the chip inside the Peugeot key is damaged then it will not send the proper signal to the vehicle.
This is a common problem that is often caused by water damage. This is particularly prevalent in colder climates where the vehicle may have been exposed to rain or snow. In this situation, contact an experienced locksmith who will have the necessary tools and equipment to change the key's programming. They will also have all the latest technology and machinery needed to make the Peugeot smart key. The process shouldn't take more than 15 minutes.
Contacts to the battery are not working properly.
Peugeot changed from the old carbon encased transponder chips to a brand new kind of chip that utilizes electronic components on a circuit board. The new system is excellent when it's new, however the circuit boards begin to degrade with time and stop working properly.
peugeot car key can stop the immobiliser chip from triggering which means that your car won't start. Contact a Peugeot specialist or a locksmith if this is the situation.

A common issue occurs when the battery of the key fob starts to fail. This causes the blade of the key to stop feeding into your lock. A car locksmith will replace the battery, and then cut a new blade for you. This is a simple fix.
Faulty Receiver Module
If your Peugeot key fob was not working after dropping it on the floor, being exposed to a sudden downpour or accidently washing it or washing it, it could be due to a faulty receiver module. The receiver module is responsible for transmitting radio frequency to the onboard computer which regulates the central locking system of your Peugeot vehicle.
The rubber seals on the key fob block water from getting to the electronic chip. The chip can be damaged by water when exposed to water for long periods of period of. Submerging the key fob into the ocean at the beach or throwing it into the water can be especially damaging because of the high salt content.
The module needs to be replaced if the Peugeot spare key no longer works. This is only done by a skilled auto locksmith or Peugeot specialist. Peugeot keys are, unlike other vehicles, are secured by an immobilizer device. This requires the proper programming to allow the car to start. This is why it is imperative that you should only trust a Peugeot locksmith to create and program a replacement.
Computer on board is not working properly
The on-board computer inside your Peugeot is responsible for a number of the systems within the car, from power windows to the airbags. The on-board computer will display an error code when something goes wrong. This code is stored inside the system and will remain there until the problem has been resolved. This will often require the on-board computers to be replaced.
One of the most common reasons for the light turning on is loose or corroded connection in the airbag sensor. This can be caused by wear and tear, age or exposure to moisture and salt. It is crucial to get this issue addressed as quickly as possible, as a malfunctioning airbag can be dangerous in the event of an accident.
If you encounter an error message that says "card not found" on your Peugeot, the key battery inside the key fob might be dead or weak. This will stop the key fob from sending a signal to deactivate the vehicle's immobilizer. You can test this by pressing the unlock button on the key fob and then trying to start your car. If this does not work the battery on the key needs to be replaced.