This Is The One Peugeot Keys Trick Every Person Should Be Able To
Peugeot 208 Key Replacement
It is best to delegate the replacement of Peugeot keys 208 to auto locksmiths who have the equipment and know-how. They can program and create keys more quickly and at a lower cost than a dealership.

If your key fob stopped locking or unlocking your doors it is likely due to a dead coin battery. But, there are other reasons why the key might be malfunctioning.
Dead Coin Battery
A dead coin battery will prevent your Peugeot 208 from locking or unlocking, and won't start the engine. If this is the case, you'll need to utilize the backup starting method that is detailed in the owner's manual to your vehicle.
The spark plugs could also be worn out. The spark plugs light the fuel to start the engine. However they are limited in their time of life. If they are not used enough to last, they'll eventually fail.
Luckily, there is an easy solution for this issue. Check the voltage of your battery with a multimeter. If the voltage is below 11,5 volts, then it's time to replace it. It is also essential to clean the battery's contacts in case it is corroded. This can be done by taking off the rubber covers from the two terminals on the battery and then using a wirebrush, you can remove any corroded battery parts. Then, reconnect the cables to the positive and negative poles.
Water Damage
If your 208 won't start and the battery hasn't gone flat, you should examine the spark plugs. It is possible that they are overly filthy, making them unable to spark. The spark plugs can be cleaned in the workshop.
Peugeot automobiles are equipped with a transponder that is compatible with the immobiliser. This ensures that only the correct key can 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 typical reason for this issue. This is a common issue in areas with colder temperatures where the vehicle is exposed to snow or rain. If this is the case, call a reputable auto locksmith who will have all of the tools and equipment required to modify the new key. They will also have the latest technology and equipment needed to create the Peugeot 208 smart key. The process shouldn't take longer 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 in circuit boards. The new system is effective when it's new, however, over time, the circuit boards begin to degrade and stop working properly.
This can prevent the immobiliser chip from working which means that your car won't start. Contact an Peugeot specialist or a locksmith if this is the case.
Another common issue is when the battery in the key fob begins to fail, which causes the key blade to stop getting into the lock. A car locksmith will replace the battery and then cut a new key blade for you. This is a simple solution.
Faulty Receiver Module
It could be that the receiver module is faulty when your Peugeot key fob isn't working after being dropped on the floor, exposed to a sudden downpour or accidentally washed. The receiver module is responsible for transmitting radio frequencies to the onboard computer which controls the central locking system of your Peugeot vehicle.
Rubber seals on the key fob block water from getting to the electronic chip. However, prolonged exposure to water can break through these seals, causing damage to the chip.
G28CarKeys in the pool or ocean water could cause damage to the key fob when it is submerged.
The module needs to be replaced if your Peugeot spare key isn't working anymore. This can only by done by an Peugeot specialist or expert auto locksmith. Peugeot keys like other cars are protected by an immobilizer system. This requires the right coding to start the car. It is for this reason that you should only rely on an authorized Peugeot locksmith to create and program a replacement.
Computers with faulty on-board computers
The on-board computer in your Peugeot is responsible for many of the systems in your car, including power windows and airbags. The on-board computer will show a code when something goes wrong. The code will be stored within the system until the problem is resolved. This will often require the on-board computers to be replaced.
One of the main reasons for the light coming on is loose or corroded connections in the airbag sensor. This can occur due to wear and tear, ageing or exposure to salt and moisture. It is imperative to have this issue resolved as soon as possible, since an airbag that is not functioning properly could be dangerous in the event an accident.
If your Peugeot is showing a card not detected error, the battery inside the key fob may be dead or weak. This will prevent the key fob from transmitting a signal that will disable the immobilizer on your vehicle's standard. You can 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 likely that the battery is in need of replacement.