What Is Peugeot Keys And How To Use It?
Peugeot 208 Key Replacement
Peugeot 208 key replacement is best left to auto locksmiths with experience who have the appropriate equipment and technical knowledge. They will be able to create and program new keys much quicker than a dealership and at a lesser cost.
A dead coin battery is the most likely cause the reason your key-fob stops locking or unlocking doors. 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, as well as making it impossible to start the engine. In this case you'll need use the alternative starting method found in your vehicle's owner's manual.
The spark plugs could also be worn out. The spark plugs ignite fuel to start the engine. However, they have a limited life span. If they're not used enough they will eventually fail.
There is a simple solution for this issue. The best way to solve this issue is to determine 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. If the battery has corrosion it is essential to clean its contacts. You can do this by lifting the rubber covers that protect the two terminals of the battery and using wire brushes to clean any parts that are corroded from the battery. Then, you must reconnect the positive pole cables to the negative.
Water Damage
If your 208 doesn't start and the battery hasn't been replaced, you must examine the spark plugs. You may find that they are dirty and don't spark. The Key Lab can be cleaned in the workshop.
Peugeot cars use a transponder style key that is compatible with the car's immobiliser system. This makes sure that only the correct key can turn the engine. If the chip in the Peugeot key is damaged then it won't send the correct signal to the vehicle.
This is a very common issue that is caused by water damage. This is a typical issue in colder climates where the vehicle has been exposed to rain or snow. If this is the case, you should contact a reputable auto locksmith who has all of the equipment and tools needed to modify the new key. They also have the most up-to-date technological know-how and machinery required to make the Peugeot 208 smart key. The process shouldn't last more than 15 minutes.
Faulty battery contacts
Peugeot replaced the old transponder chips by introducing a new version that makes use of electronic components that are mounted on a circuitboard. This new technology works great when it's brand new but over time the circuit boards start to wear out and stop functioning properly.
This can prevent the immobiliser's function from being activated, meaning your vehicle won't be able to start. Contact a Peugeot specialist, or a locksmith, if this is the situation.
A common problem is when the battery in the key fob starts to die. This causes the blade of the key to stop feeding into your lock. A locksmith for cars can replace the battery and cut a new blade for you, it's usually a simple fix.
Faulty Receiver Module
If your Peugeot key fob was not working after dropping it on the floor, getting exposed to a sudden downpour or accidentally washing it or washing it, it could be due a malfunctioning receiver module. The receiver is responsible for transmitting radio frequency signals to the on-board computer, which is responsible for controlling the centralized locking system within your Peugeot vehicle.
The key fob itself has rubber seals that prevent water from reaching the chip inside. The chip can be damaged by water if it is exposed to water for a long period of. Submerging the key fob in the ocean 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 does not work anymore. This should be done by an Peugeot specialist or expert auto locksmith. Unlike other cars, Peugeot keys are protected by an exclusive immobilizer system that requires the correct code for the start of the engine. This is why it is imperative that you should only rely on an authorized Peugeot locksmith to create and program a replacement.
Computer malfunctioning on-board
The computer on the board of your Peugeot is responsible for a variety of the systems inside your car, from airbags to power windows. The on-board computer will display a code if something goes wrong. This code is stored inside the system and will stay there until the problem has been resolved. Most often, this involves replacing the onboard computer.
One of the main causes of the light turning on is the loose or corroded connections within the airbag sensor. This can be caused by wear and tear, ageing, or exposure to salt and moisture. It is essential to have this issue resolved as soon as possible, since an airbag that is not functioning properly could be dangerous in the event of an accident.
If you see an error message stating that the card is not found on your Peugeot, the key battery in the key fob may be weak or dead. This will prevent the key fob from sending a signal that disarms the standard immobilizer in your vehicle. Test this by pressing the unlock button on the key fob, and then trying to start your vehicle. If this doesn't work it is because the battery of the key is in need of replacement.