Mazda CX-9 2019 Owner's Manual page 606

If Trouble Arises
Warning/Indicator Lights and Warning Sounds
KEY Warning Indication/Warning Light
Take the appropriate action and verify that the warning light turns off.
Signal
(White)
KEY Warning Indica‐
tion
(Red)
(Flashing)
KEY Warning Light
7-42
Cause
The key battery is dead.
The key battery is dead.
The key is not within the operation range.
The key is placed in areas inside the cabin
where it is difficult for the key to be detect‐
ed.
A key from another manufacturer similar to
the key is in the operation range.
Without the ignition switched off, the key is
taken out of the cabin, and then all the
doors are closed.
Action to be taken
Replace the key battery (page 6-36).
Replace the key battery (page 6-36).
Bring the key into the operation range
(page 3-7).
Take the key from another manufacturer
similar to the key out of the operation
range.
Bring the key back into the cabin.