What causes a smart fob to stop working?
A smart fob can stop working for several reasons and diagnosing them is quite simple. In most cases, it’s the battery that has gone bad, but there could be a couple of other problems too. Before starting to diagnose the causes, you can use a backup key fob (if you have one) to see whether the problem is with the remote or the car door.
Why is my key fob on my Mercedes not working?
Usually when Mercedes key fob is not working, it’s because either because the key is defective or the All Activity Module (AAM) is not recognizing the key signal, or it is not receiving signal due to an antenna issue.
Where is the spare key on a smart FOB?
Vehicles have a physical key for locking and unlocking the door. If you close and open your car door with the smart fob, this key is likely to be hidden inside the fob. There should be a release button or catch in the remote, pressing which will pop out the spare key. But some vehicles may not have a visible keyhole.
Why is my car door FOB not working?
If the problem occurs due to a dead battery but there is no shop around to buy a new one, hold the fob against the door’s handle and try to pull it. The battery may have a little juice left that can open the door when you keep the fob at a close distance.
What happens when your key fob is not working?
A faulty key fob is an inconvenience that can throw off your whole schedule. While it may seem far-fetched to think of your fob as needing regular maintenance, your key fob is not something to overlook because when it fails it can stop you from being able to enter your vehicle at all, let alone start the engine.
What to do if your smart FOB won’t work?
If the smart fob does not have any physical damage, the easiest solution to fix this issue is to change the battery. Open the battery cover and pry out the battery with something like a small screwdriver or a key. Take notes of the numbers on the battery and replace it with a similar one.
Vehicles have a physical key for locking and unlocking the door. If you close and open your car door with the smart fob, this key is likely to be hidden inside the fob. There should be a release button or catch in the remote, pressing which will pop out the spare key. But some vehicles may not have a visible keyhole.