Why Adding Peugeot Keys To Your Life Will Make All The A Difference
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 quicker than a dealership and at a lesser cost.
If the 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 stop your Peugeot 208 from locking and unlocking, and also hindering it from starting the engine. If this is the scenario, you'll need make use of the backup starting procedure that is described in the owner's manual of your vehicle.
Another reason your 208 may not start is that the spark plugs are been worn down. The spark plugs ignite fuel to start the engine. They have a limited life span. They'll eventually break down if they're not used enough.
Luckily, there is an easy solution for this issue. The best way to solve this issue is to measure the voltage of your car battery with a multimeter. If it's lower than 11.5 volts then you must replace it. If the battery has corrosion, it is important to clean its contacts. This can be done by lifting the rubber covers that cover both battery terminals and using wire brushes to clean any corroded parts of the battery. Then, you must reconnect the positive pole cables to the negative.
Water Damage
If your 208 doesn't start and the battery is not running, then make sure whether the spark plugs are in good working order. You might find that they're dirty and don't spark. This is easily fixed by cleaning the spark plugs in a workshop.
Peugeot cars use a transponder style key that works with the car's ignition system. This ensures that only the right 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 particularly prevalent in colder climates where the vehicle could have been exposed to rain or snow. If this is the case, seek out a reputable auto locksmith who has all of the tools and equipment required to change the key's programming. They will also have all the latest technology and machinery needed to create a Peugeot smart key. The process should take no more than 15 minutes.
Contacts of the battery may be damaged.
Peugeot changed from the old carbon encased transponder chips and introduced a new type of chip that incorporates electronic components within a circuit board. The new system is effective when it's brand new however, over time, the circuit boards start to lose their effectiveness and cease working correctly.
This can prevent the immobiliser chip from working, so your car won't start. If this happens it's a good idea get in touch with a Peugeot specialist or locksmith.
A common issue is when the battery of the key fob starts to die. This causes the blade of the key to stop feeding into your lock. A locksmith in your car will replace the battery, and cut a new blade for you. This is a simple solution.
Faulty Receiver Module
It could be that the receiver module is malfunctioning in the event that your Peugeot key fob doesn't work after being dropped on the floor, exposed to a sudden downpour or accidentally washed. The receiver is responsible for transmitting radio frequency signals to the onboard computer, which controls the central locking system inside your Peugeot vehicle.
The key fob itself has rubber seals to prevent water from getting to the electronic chip inside. Water can damage the chip in the event that it is exposed water for long periods of period of. Submerging the key fob in sea water at the beach or throwing it into the pool can be particularly damaging due to the high salt content.
If your Peugeot spare key fob doesn't work it is necessary to have the module replaced. This can only be performed by a professional auto locksmith or Peugeot specialist. Peugeot keys, unlike other cars, are secured by an immobilizer device. This requires the correct codes to start the car. This is the reason why you should only go with a knowledgeable Peugeot locksmith for the job of programming and creating a replacement.
Computer on board is not working properly
The computer on board of your Peugeot is responsible many functions in your car including power windows and airbags. If G28 goes wrong with these systems, it will typically show a code that identifies the issue. This code is stored in the system and stays there until the issue is resolved. This could mean that the on-board computers to be replaced.
One of the main reasons for the airbag light flashing is loose or corroded connections in the airbag sensor. This could be due to wear and tear, ageing or exposure to salt and moisture. This issue must be addressed as soon you can, because an airbag that is malfunctioning could be dangerous in the event of an accident.
If you encounter the error "card not found" on your Peugeot, the key battery in the key fob could be dead or weak. This will stop the key fob from sending a signal to disable the immobilizer on your vehicle. You can test this by pressing the unlock button on the key fob, then attempting to start your vehicle. If this fails then the battery on the key must be replaced.