Peugeot 208 Key Replacement
Peugeot 208 key replacement should be left to auto locksmiths with experience who have the appropriate equipment and know-how. They can design and program keys faster and less expensive than dealers.
A dead battery for your coin is most likely to be the cause the reason why your key fob isn't locking or unlocking the doors. However, there are many other possibilities that the key is malfunctioning.
Dead Coin Battery
A dead coin battery can stop your Peugeot 208 from locking or unlocking, and won't start the engine. In this scenario you'll have to employ the alternate method of starting that is described in the owner's manual.
The spark plugs can also be worn out. The spark plugs are responsible for instigating the fuel that ignites the engine. However they have a finite life span. They'll eventually degrade in the event that they aren't utilized enough.
Fortunately, there's an easy solution to this problem. Examine the voltage of your battery using a multimeter. If the voltage is less than 11,5 volts, then it's time to replace it. If the battery has corrosion, it is important to clean its contacts. This can be accomplished by taking off the rubber covers from the two battery terminals, and then using a wirebrush to remove any corroded battery parts. Then, you should reconnect the positive and negative pole cables.
Water Damage
If your 208 does not start and the battery hasn't gone flat, you should examine the spark plugs. It is possible that they're filthy, making them unable to spark. This can be fixed easily by cleaning the spark plugs in the workshop.
Peugeot cars use a key with a transponder compatible with the immobiliser. This makes sure that only the correct key can start the engine. If the chip inside the Peugeot key is damaged, it won't send the proper signal to the vehicle.

Water damage is a common cause of this issue. This is a common problem in warmer climates where the vehicle is exposed to snow or rain. In this case, you need to contact a trusted locksmith who will have the required tools and equipment to change the key's programming. They'll also have the latest technology and machinery needed to create a Peugeot smart key. The process shouldn't last more than 15 minutes.
peugeot 207 replacement key cost with the battery may be damaged.
Peugeot replaced the transponder chips by introducing a new type that uses electronic components that are mounted on a circuit board. The new system is great when it's brand new, but the circuit boards wear out over time and stop working properly.
This can stop the immobiliser from working, so your vehicle won't start. Contact an Peugeot specialist, or a locksmith if this is the case.
Another common issue is when the key fob battery starts to die, this causes the blade of the key to stop from entering the lock. A locksmith from your car will replace the battery, and cut a new blade for you. This is a simple fix.
Faulty Receiver Module
It could be that the receiver module is defective in the event that your Peugeot key fob fails to function after being dropped on the floor, or exposed to a stormy rainstorm, or accidentally washed. The receiver is responsible for sending radio frequency signals to the onboard computer, which controls the central locking system inside your Peugeot vehicle.
The rubber seals on the key fob prevent water from getting to the electronic chip. Water can damage the chip if it is exposed to water for a long time. Submerging the key fob in ocean water at the beach or throwing it into the water can be especially damaging because of the high salt content.
The module must be replaced if your Peugeot spare key no longer works. This is only done by a skilled auto locksmith or Peugeot specialist. As opposed to other cars, Peugeot keys are protected by an exclusive immobilizer system that requires the right coding in order to start the engine. This is the reason that you should only rely on a Peugeot locksmith to design and program the replacement.
Computer with a problem on board
The computer on board in your Peugeot is responsible for a number of the systems in your car, from airbags to power windows. The on-board computer displays a code when something goes wrong. This code will be stored in the system until the problem is resolved. This can often mean that the on-board computers to be replaced.
One of the most frequent causes of the airbag light turning on is loose or corroded connectors in the airbag sensor. This can be caused by wear and tear, aging or exposure to moisture and salt. It is crucial to get this issue addressed as quickly as you can, since a malfunctioning airbag can be dangerous in the event an accident.
If you find the error "card not found" on your Peugeot, the key battery inside the key fob may be dead or weak. This will stop the key fob sending a signal to deactivate your vehicle's immobilizer. You can test this by pressing the unlock button on the key fob and then trying to start your vehicle. If this fails it is because the battery of the key needs to be replaced.