Mazda MX-5 "KEY" warning light

mazda
keys
miata

#1

My 2008 Miata with Advanced Keyless Entry stystem shows a “KEY” warning in red letters sometimes. The manual warns that cell phones could cause this or maybe the key card needs a battery. I’ve put in a new battery. I don’t turn on my cell phone. I’ve taken it to my Mazda dealer who has put in a computer module card, twice now. And, I still get the warning occasionally. Anyone know what’s going on?


#2

It is hard to say what is going on. I would first suspect a RFI problem. If the trouble happens at a cetain location then there may be a transmitter nearby that is causing the trouble.


#3

If you keys for other cars on the same key ring it can confuse the car’s key security system. Try separating all the keys and see if it makes a difference.


#4

Sounds to me like your key fob battery is weak , you can purchase one at walmary