Low fuel warning light

The low fuel warning light illuminates when the tank is nearly empty approximately 2.6 US gal (10.0 liters, or 2.2 Imp gal). It only operates when the ignition switch is in the “ON” position. When this light illuminates, fill the fuel tank immediately.
NOTE
This light does not turn off unless the tank is replenished up to an internal fuel quantity of approximately 3.7 US gal (14 liters, 3.1 Imp gal).

Promptly put fuel in the tank whenever the low fuel warning light illuminates. Engine misfires as a result of an empty tank could cause damage to the engine.
See also:
Light control switch
The light control switch only operates when the key is inserted into the ignition
switch.
Regardless of the position of the light control switch, the illuminated lights
are turned off when the ke ...
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Other bulbs may be difficult to replace. We recommend that you have the bulbs
replaced by your SUBARU dealer if necessary. ...
Most common causes of corrosion
The most common causes of corrosion are:
1. The accumulation of moisture retaining dirt and debris in body panel sections,
cavities, and other areas.
2. Damage to paint and other protective coatin ...
