Peugeot 208 Key Replacement
Peugeot 208 key replacement is best left to experienced auto locksmiths who have the right tools and know-how. They will be able to create and program new keys much quicker than a dealership and at a lower cost.
If your key fob stopped locking or unlocking your doors, it is likely due to a dead battery in the coin. However, there are other reasons that the key may be malfunctioning.
Dead Coin Battery
A dead coin battery will stop your Peugeot 208 from locking and unlocking, and also preventing it from starting the engine. If this is the scenario, you'll need utilize the backup starting method that's described in the owner's manual to your vehicle.
The spark plugs may also be worn out. The spark plugs ignite fuel to start the engine. However they have a finite life span. If they aren't used enough and they fail, they'll eventually die.
Luckily, there's an easy solution to this problem. Check the voltage of your battery using a multimeter. If the voltage falls below 11,5 volts, it's time to replace it. It is also necessary to clean the contacts of the battery in case it is corroded. This can be done by lifting the rubber covers that protect the two battery terminals and using wire brushes to clean any corroded areas of the battery. Then, you must reconnect the positive pole cables to the negative.
peugeot keys
If your 208 won't start and the battery has not fallen flat, it is time to examine the spark plugs. You may find that they are dirty and do not spark. The spark plugs can be cleaned in the workshop.
Peugeot cars are equipped with a key with a transponder compatible with the immobiliser. This makes sure that only the correct key can turn the engine. If the chip inside the Peugeot key is damaged, it won't send the correct signal to the vehicle.
This is a frequent issue that can occur due to water damage. This is a common problem in areas with colder temperatures where the vehicle is exposed to rain or snow. In this case, you need to contact a reputable locksmith who has the tools and equipment needed to change the key's programming. They also have the most up-to-date technology and the machinery needed to create a Peugeot 208 smart key. The process should take no more than 15 minutes.
Contacts to the battery are not working properly.
Peugeot replaced the transponder chips using a new version that makes use of electronic components that are mounted on a circuitboard. The new system is fantastic when it's brand new, but the circuit boards begin to degrade with time and cease to function properly.
This could stop the immobiliser from working, so your vehicle will not start. If this is the case, it's a good idea to seek out a Peugeot specialist or locksmith.

The most frequent issue is when the battery inside the key fob begins 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 key blade for you. This is a quick solution.
Faulty Receiver Module
If your Peugeot key fob stopped working after dropping it on the floor, being exposed to a sudden downpour or accidentally washing it or washing it, it could be due to a defective receiver module. The receiver is responsible for sending radio frequency signals to an on-board computer that controls the central locking system of your Peugeot vehicle.
The key fob itself has rubber seals that prevent water from getting to the chip inside. However prolonged exposure to water could penetrate these seals and damage the chip. Submerging the key fob in ocean water on the beach or throwing it into the pool could be especially damaging because of the high salt content.
The module will need to be replaced if your Peugeot spare key does not work anymore. This can only be done by an expert auto locksmith or Peugeot specialist. As opposed to other cars, Peugeot keys are protected by an unique immobilizer system that requires the right coding in order to start the engine. This is the reason why you should only trust an experienced Peugeot locksmith for the job of designing and programming an appropriate replacement.
Computer malfunctioning on-board
The on-board computer inside your Peugeot is responsible for a variety of the systems within your car, ranging from power windows to the airbags. When something goes wrong with these systems, it will typically display a code that identifies the problem. The code will be stored in the system until the issue is fixed. In most cases, this will require replacing the on-board computer.
One of the main causes of the light coming on is loose or corroded connections in the airbag sensor. This can be caused by wear and tear, ageing, or exposure to moisture and salt. It is imperative to have this issue resolved as soon as possible, since the airbag malfunctioning could be dangerous in the event of an accident.
If your Peugeot is showing a card that is not being detected error then the key battery in the key fob might be dead or weak. This will prevent the key fob from sending a signal that disables your vehicle's standard immobilizer. You can test this by pressing the unlock button on the key fob and then attempting to start your car. If this doesn't work the battery on the key must be replaced.