I have a Toyota, and my key fob light stayed on also. I called the dealer, and they said the button on the fob was stuck down INSIDE the fob. So, I simply unscrewed the screw on the back of the fob, opened the fob, then put it back together. The fob was fixed. I didn't have to fix anything in the fob.
Split the remote open at the key fob loop.
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chip car key Fob Keys key broken off key stuck automotive key extraction car key maker
Well that question is too general. What year and what make is the vehicle? Is it a brand new key fob? If it is brand new it may need to be programed to the vehicle. The battery may be dead in the fob. The fob may also have a broken contact inside of it. I recommend taking your key fob and vehicle to the dealer for diagnosis.
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Emergency lockout lock repair lock change broken key extraction Key replacement car key fob programming
It means get a new battery or the battery is broken.
Two wire connection in the fob. Open and check both wires are fix in place.
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trunk opening chip car key Fob Keys key broken off key stuck automotive key extraction car key maker
It's not that the key fob stopped working, but, if your car battery is dead, it's the car that has no power to pop the door locks.