Take the appropriate action and verify that the warning light turns off.

Taking Action
Message Indicated on DisplayMazda 6 Owners Manual: Fuel-Filler Cap
To remove the fuel-filler cap, turn it counterclockwise.
Attach the removed cap to the inner side of the fuel lid.
To close the fuel-filler cap, turn it clockwise until a click is heard.
CAUTION
(U.S.A. and Canada) If the check fuel cap warning light illuminates,
the fuel-filler cap may not ...
Mazda 6 Owners Manual: Drive Selection (Some models)
Drive selection is a system to switch the vehicle's drive mode. When the sport
mode is selected, vehicle's response against accelerator operation is enhanced.
This provides additional quick acceleration which may be needed to safely make maneuvers
such as lane changes, merging onto freeways, o ...