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

Taking Action
Message Indicated on DisplayMazda 6 Owners Manual: Dtc table
DTCs are common for present and past malfunction diagnosis.
Note
When DTCs not shown in the DTC table are displayed, replace
the SAS unit.
If the air bag system warning light does not illuminate or
remains illuminated when the ignition switch is turned to ON position,
i ...
Mazda 6 Owners Manual: Meters and Gauges
Instrument Cluster Type A
Type B
Steering Switch
1 - Speedometer 2 - Odometer, Trip Meter and Trip Meter Selector 3 - Tachometer
4 - Dashboard Illumination 5 - Trip Computer and INFO Switch 6 - Engine Coolant
Temperature Gauge 7 - Fuel Gauge 8 - Outside Temperature Display 9 - Cruise
...