Honda 2003 Civic GX Owner's Manual Supplement page 5

Indicator Lights
If you smell natural gas or hear a
hissing sound, except when refueling,
the fuel system may have a leak.
Follow the instructions under
Fuel System Has a Leak
41 of this supplement.
4
Instruments and Controls
This indicator comes on for a few
seconds when you turn ignition on
If the
on page (II).
This light comes on as a reminder
that you must refuel soon. The
approximate driving distance
remaining when this light comes on
is:
City driving
Highway driving
If the outside temperature falls
below 25°F ( 4°C), the pressure of
the natural gas in the fuel tank may
go down. If this happens, the fuel
gauge will show less than the actual
amount of fuel remaining, and this
indicator may come on.
Low Fuel Indicator
20-25 miles
25-30 miles
If this indicator starts blinking and
the fuel level reading goes down to
empty when the engine is running, it
indicates a problem in the fuel
system. Have the vehicle checked by
an authorized Honda Civic GX dealer
as soon as possible.