Ford 2002 Focus Owner's Manual page 21

Instrument Cluster
This gauge indicates the
temperature of the engine coolant,
not the coolant level. If the coolant
is not at its proper level the gauge
indication will not be accurate. If
the gauge enters the red section
and the multi function warning
light illuminates, refer to How fail
safe cooling works in coolant in
the Maintenance and
Specifications chapter.
Never remove the coolant
reservoir cap while the
engine is running or hot.
Fuel gauge
Displays approximately how much
fuel is in the fuel tank (when the
key is in the ON/RUN position). The
fuel gauge may vary slightly when
the vehicle is in motion. The
ignition should be in the OFF
position while the vehicle is being
refueled. When the gauge first
indicates empty, there is a small
amount of reserve fuel in the tank.
When refueling the vehicle from
empty indication, the amount of
fuel that can be added will be less
than the advertised capacity due to
the reserve fuel.
If the key is not in the OFF position
when you refuel the vehicle, the
fuel gauge will not indicate the new
volume until the ignition is turned
OFF and then to ON/RUN.
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